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 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 1,374 $ 1,984 $ 3,808 $ 6,324
Tax benefit computed at the statutory rate 289 694 800 2,213
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation 1,304 1,914 3,598 6,114
Restricted Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 70 $ 70 $ 210 $ 210