Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v2.4.1.9
Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
item
Commitments and Contingencies  
Number of previous claims experienced 0env_LossContingencyNumberOfPreviousClaimsExperienced
Future annual minimum lease commitments under operating leases  
Remainder of 2015 $ 6,791us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear
2016 7,917us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 7,208us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 6,727us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 6,628us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter 23,238us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total $ 58,509us-gaap_OperatingLeasesFutureMinimumPaymentsDue