Debt (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
0 Months Ended | 3 Months Ended | ||
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Dec. 15, 2014
item
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Mar. 31, 2015
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Dec. 31, 2014
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Dec. 15, 2014
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Debt | ||||
Discount | $ 4,418us-gaap_DebtInstrumentUnamortizedDiscount | $ 4,612us-gaap_DebtInstrumentUnamortizedDiscount | ||
Accretion of debt discount | 2,356us-gaap_AmortizationOfDebtDiscountPremium | |||
Unsecured debt | Convertible Notes | ||||
Debt | ||||
Face amount |
172,500us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
172,500us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Face amount and over-allotment amounts |
172,500env_DebtInstrumentFaceAmountAndOverAllotments / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
172,500env_DebtInstrumentFaceAmountAndOverAllotments / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Interest rate (as a percent) |
1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
Net proceeds from offering |
166,967us-gaap_ProceedsFromDebtNetOfIssuanceCosts / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Repurchase percentage of principal (as a percent) |
100.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Conversion rate |
0.0159022us-gaap_DebtInstrumentConvertibleConversionRatio1 / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Conversion price (in dollars per share) |
$ 62.88us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
$ 62.88us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
$ 62.88us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
$ 62.88us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
Threshold trading days (in days) |
20us-gaap_DebtInstrumentConvertibleThresholdTradingDays / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Consecutive trading days | 30 days | |||
Threshold percentage of stock price trigger (as a percent) |
130.00%us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Threshold business days | 5 days | |||
Threshold consecutive trading-day period | 5 days | |||
Threshold percentage of trading price trigger (as a percent) |
98.00%env_DebtInstrumentConvertibleThresholdPercentageOfTradingPriceTrigger / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Allocated to equity components |
26,618us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
26,618us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Offering costs |
882env_DebtInstrumentConvertibleCarryingAmountOfEquityComponentOfferingCosts / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
882env_DebtInstrumentConvertibleCarryingAmountOfEquityComponentOfferingCosts / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Discount |
27,500us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
26,089us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
27,297us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
27,500us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
Accretion of debt discount |
1,210us-gaap_AmortizationOfDebtDiscountPremium / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Effective interest rate on the liability component (as a percent) |
6.10%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Unsecured debt | Convertible Notes | Other non-current assets | ||||
Debt | ||||
Issuance costs |
$ 4,651us-gaap_DeferredFinanceCostsNoncurrentGross / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
$ 4,651us-gaap_DeferredFinanceCostsNoncurrentGross / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember / us-gaap_DebtInstrumentAxis = env_ConvertibleUnsecured1.75PercentNotesDueDecember2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
X | ||||||||||
- Definition
Represents the offering costs associated with the equity component of a convertible debt instrument. No definition available.
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X | ||||||||||
- Definition
Threshold period for consecutive business-day period. No definition available.
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X | ||||||||||
- Definition
Threshold period for consecutive trading-day period. No definition available.
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X | ||||||||||
- Definition
Maximum percentage of the trading price per principal amount of convertible debt instruments for each trading day in the consecutive trading-day period to determine eligibility of conversion. No definition available.
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X | ||||||||||
- Definition
Represents the face amount of a debt instrument and over-allotment amounts. No definition available.
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X | ||||||||||
- Definition
Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The price per share of the conversion feature embedded in the debt instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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X | ||||||||||
- Definition
Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion. No definition available.
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X | ||||||||||
- Definition
Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. No definition available.
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X | ||||||||||
- Definition
Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Definition
Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Gross amount, as of the balance sheet date, of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings in periods after one year or beyond the normal operating cycle, if longer, over the life of the long-term debt instruments to which such costs pertain. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. No definition available.
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X | ||||||||||
- Details
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