|
Income Taxes (Details 6) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
item
|
Dec. 31, 2013
item
|
Dec. 31, 2012
|
|
| Reconciliation of unrecognized tax benefit | |||
| Unrecognized tax benefits balance at beginning of year | $ 2,058us-gaap_UnrecognizedTaxBenefits | $ 1,097us-gaap_UnrecognizedTaxBenefits | $ 364us-gaap_UnrecognizedTaxBenefits |
| Additions based on tax positions related to the current year | 365us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 181us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 517us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions |
| Additions based on tax positions related to prior years | 142us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 1,045us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 474us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions |
| Reductions for settlements with taxing authorities related to prior years | (261)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | (56)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | |
| Reductions for lapses of statute of limitations | (212)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (209)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (258)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations |
| Unrecognized tax benefits balance at end of year | 2,092us-gaap_UnrecognizedTaxBenefits | 2,058us-gaap_UnrecognizedTaxBenefits | 1,097us-gaap_UnrecognizedTaxBenefits |
| Unrecognized tax benefits that would impact effective tax rate, if recognized | 1,973us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | ||
| Reasonably possible decrease in liability for unrecognized tax benefits in the next twelve months | 1,469us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound | ||
| Number of states where the entity filed voluntary disclosure agreements | 6env_NumberOfStatesWhereVoluntaryDisclosureAgreementsWereFiled | ||
| Number of states where voluntary disclosure agreements were executed | 3env_NumberOfStatesWhereVoluntaryDisclosureAgreementsWereFiledWithExecutedAgreements | ||
| Number of states where voluntary disclosure agreements were closed | 1env_NumberOfStatesWhereVoluntaryDisclosureAgreementsWereClosed | ||
| Number of states where voluntary disclosure agreements were filed as required | 3env_NumberOfStatesWhereVoluntaryDisclosureAgreementsFiledAsRequired | ||
| Timeframe in which the voluntary disclosure agreements are expected to be settle | 12 months | ||
| Potential interest and penalties related to unrecognized tax benefits included in income tax expense/(benefit) | (41)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 33us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 448us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense |
| Accrued interest and penalties on unrecognized tax benefits | $ 594us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | $ 636us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | |
| X | ||||||||||
|
- Definition
Represents the number of states where the entity had disclosures agreements filed as required to limit the exposure to state and income taxes in the state where the entity had not filed tax returns. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the number of states where the entity had disclosure agreements closed to limit the exposure to state and income taxes in the state where the entity had not filed tax returns. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the number of states where the entity filed voluntary disclosure agreements to limit the exposure to state income taxes in the states where the entity had not filed tax returns. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the number of states where the entity had disclosure agreements executed to limit the exposure to state and income taxes in the states where the entity had not filed tax returns. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the period within which the voluntary disclosure agreements were supposed to be settled as per management conviction. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of (increase) decrease reasonably possible in the estimated upper bound of the unrecognized tax benefit for a tax position taken or expected to be taken. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|