Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statement of Equity

v2.4.1.9
Condensed Consolidated Statement of Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Non-controlling Interest
Total
Balance at Dec. 31, 2014 $ 232us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ (13,242)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ 233,888us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (19,443)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 556us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
$ 201,991us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 31, 2014 46,345,376us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
11,800,723us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
       
Increase (decrease) in shareholders' equity            
Exercise of stock options 2us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  3,708us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    3,710us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Exercise of stock options (in shares) 415,512us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Issuance of common stock - vesting of restricted stock 2env_StockIssuedDuringPeriodValueRestrictedStockAwardVested
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
        2env_StockIssuedDuringPeriodValueRestrictedStockAwardVested
Issuance of common stock - vesting of restricted stock (in shares) 358,166env_StockIssuedDuringPeriodSharesRestrictedStockAwardVested
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
         
Stock-based compensation expense     3,419us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    3,419us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Excess tax benefits from stock-based compensation expense     11,468us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    11,468us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Purchase of treasury stock for stock-based minimum tax withholdings   (6,441)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
      (6,441)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Purchase of treasury stock for stock-based minimum tax withholdings (in shares)   (117,180)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
       
Net income       2,511us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  2,511us-gaap_ProfitLoss
Balance at Mar. 31, 2015 $ 236us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ (19,683)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ 252,483us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (16,932)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 556us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
$ 216,660us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Mar. 31, 2015 47,119,054us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
11,917,903us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember