Annual report pursuant to Section 13 and 15(d)

Earnings per Share (Details 2)

v2.4.1.9
Earnings per Share (Details 2)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 2,834,113us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 432,272us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1,769,299us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Stock Options      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares)     1,209,748us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= env_EmployeeAndOtherStockOptionMember
Restricted Stock      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 90,792us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember 		432,272us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember 		559,551us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember
Common warrants      
Common share equivalents for securities that were anti-dilutive and therefore excluded from the computation of diluted earnings per share      
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) 2,743,321us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantMember