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Income Taxes - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Income Tax Expense (Benefit), Continuing Operations [Abstract] | ||||
| Income tax expense (benefit) | $ 8,033,000 | $ (2,175,000) | $ 35,358,000 | $ 33,959,000 |
| Effective tax rate | 36.10% | 59.70% | 35.90% | 38.00% |
| Federal statutory income tax rate | 35.00% | |||
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Maximum
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| Income Tax Expense (Benefit), Continuing Operations [Abstract] | ||||
| Accrued interest related to unrecognized tax benefit | 100,000 | 100,000 | ||
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Tax loss carrybacks to 2010 and 2011
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| Income Tax Expense (Benefit), Continuing Operations [Abstract] | ||||
| Unrecognized tax benefits | 9,500,000 | 9,500,000 | ||
| Proceeds from income tax refunds | $ 59,100,000 | $ 59,100,000 | ||
| X | ||||||||||
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount of cash received during the period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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