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)

v3.10.0.1
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, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 1,215 $ 2,412 $ 2,434 $ 4,340
Tax benefit computed at the statutory rate 255 844 511 1,519
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation 1,145 2,342 2,294 4,200
Restricted Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 70 $ 70 $ 140 $ 140