Annual report pursuant to Section 13 and 15(d)

Accrued Expenses (Details)

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Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Components of accrued expenses    
Accrued investment manager fees $ 25,195env_AccruedInvestmentManagerFees $ 19,310env_AccruedInvestmentManagerFees
Accrued compensation and related taxes 18,344us-gaap_EmployeeRelatedLiabilitiesCurrent 12,125us-gaap_EmployeeRelatedLiabilitiesCurrent
Accrued professional services 536us-gaap_AccruedProfessionalFeesCurrent 694us-gaap_AccruedProfessionalFeesCurrent
Accrued restructuring charges   551us-gaap_RestructuringReserveCurrent
Other accrued expenses 3,372us-gaap_OtherAccruedLiabilitiesCurrent 2,562us-gaap_OtherAccruedLiabilitiesCurrent
Estimated accrued software license fees 800env_AccruedSoftwareLicenseFees  
Total accrued expenses $ 48,247us-gaap_AccruedLiabilitiesCurrent $ 35,242us-gaap_AccruedLiabilitiesCurrent