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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Line Items]
Effective tax rate	23.80%	37.70%	24.40%	29.90%
Recapitalization expenses		$ 2,300
Unrecognized tax benefits	20,989		20,989		21,024
Unrecognized tax benefits that would impact effective tax rate	20,831		20,831		20,871
Unrecognized tax benefits, interest on income taxes accrued	$ 3,841		$ 3,841		$ 3,423

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Withholding taxes relating to remittance of funds between subsidiaries to partly fund the payment of special cash dividend.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of interest expense accrued for an underpayment of income taxes.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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