Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.7.0.1
Basis of Presentation (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Feb. 25, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Shares authorized for repurchase     2,000,000
Remaining shares authorized for repurchase 1,956,390    
Shares repurchased 0    
Net cash provided by operating activities $ 35,544 $ 26,125  
Net cash used in financing activities $ (45,857) (11,550)  
Accounting Standards Update 2016-09 | Adjustment      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net cash provided by operating activities   (183)  
Net cash used in financing activities   $ 183