Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Incentive Compensation Expense under Share-Based Payment Arrangements and Related Tax Benefit (Details)

v3.7.0.1
Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Incentive Compensation Expense under Share-Based Payment Arrangements and Related Tax Benefit (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 2,412 $ 2,585 $ 4,340 $ 5,121
Tax benefit computed at the statutory rate 844 904 1,519 1,792
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation 2,342 2,439 4,200 4,888
Restricted Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 70 $ 146 $ 140 $ 233