|
Income Taxes - Additional Information (Detail) (USD $)
|
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
| Income Tax Disclosure [Abstract] | ||||
| Provision (benefit) for income taxes | $ 5,821,000 | $ (47,177,000) | $ 10,505,000 | $ (47,098,000) |
| Effective income tax rate | 37.95% | 548.70% | 34.86% | 294.00% |
| Net tax benefit due to change in effective tax rate | 47,100,000 | |||
| Reversal of valuation allowance on deferred tax assets | 53,100,000 | |||
| Income tax expense includes revision of deferred tax estimate from stock options and state tax | $ 11,000 | $ (768,000) | ||
| X | ||||||||||
|
- Definition
Income Tax Expense Including Stock Options And State Tax Adjustment No definition available.
|
| X | ||||||||||
|
- Definition
Reversal of valuation allowance on deferred tax assets. No definition available.
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|