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)

v3.2.0.727
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, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 2,892 $ 3,887 $ 5,708 $ 7,644
Tax benefit computed at the statutory rate 1,012 1,360 1,998 2,675
Restricted Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation 90 84 183 183
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation $ 2,802 3,625 5,619 6,161
Common Stock        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation   $ 178 $ (94) $ 1,300