|
Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Compensation Expense under Share-Based Payment Arrangements and Related Tax Benefit (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based compensation | $ 3,887 | $ 2,695 | $ 7,644 | $ 4,950 |
| Tax benefit computed at the statutory rate | 1,360 | 943 | 2,675 | 1,733 |
|
Restricted Stock
|
||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based compensation | 84 | 99 | 183 | 198 |
|
Restricted Stock Units
|
||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based compensation | 3,625 | 2,596 | 6,161 | 4,752 |
|
Common Shares
|
||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based compensation | $ 178 | $ 1,300 | ||