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Share-Based 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 |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Share-based compensation | $ 14,744us-gaap_ShareBasedCompensation | $ 11,525us-gaap_ShareBasedCompensation | $ 12,398us-gaap_ShareBasedCompensation |
| Tax benefit computed at the statutory rate | 5,160us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 4,034us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 4,339us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense |
| Restricted Shares | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Share-based compensation |
369us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
397us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
399us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
| Restricted Stock Units (RSUs) | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Share-based compensation |
13,150us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
11,128us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
11,999us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
| Common Stock | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Share-based compensation |
$ 1,225us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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- Definition
The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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