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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | |||
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Sep. 30, 2013
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Sep. 30, 2012
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Jun. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Significant Accounting Policies [Line Items] | |||||
| Effective tax rate from continuing operations | 36.30% | 38.60% | 37.80% | 34.80% | |
| Tax benefit from state tax settlement | $ 3.6 | ||||
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Maximum [Member]
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| Significant Accounting Policies [Line Items] | |||||
| Expected effective tax rate for continuing operations Range | 40.00% | ||||
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Minimum [Member]
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| Significant Accounting Policies [Line Items] | |||||
| Expected effective tax rate for continuing operations Range | 38.00% | ||||
| X | ||||||||||
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- Definition
Effective income tax rate continuing operations future period. No definition available.
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| X | ||||||||||
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- Details
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| 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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| X | ||||||||||
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- 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 state and local income tax settlement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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