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Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits, beginning of the year	$ 24,479	$ 29,892	$ 28,316
Additions for tax positions of prior years	3,582		1,894
Reductions for tax positions of prior years		(3,548)	(1,748)
Additions for tax positions related to the current year	813	958	2,764
Reductions due to settlements	(13,707)	(2,531)	(690)
Reductions due to lapse of applicable statute of limitations	(1,267)	(292)	(644)
Subtotal	13,900	24,479	29,892
Interest and penalties	3,107	3,794	4,532
Total gross unrecognized tax benefits, end of the year	$ 17,007	$ 28,273	$ 34,424

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Unrecognized Tax Benefits Before Interest And Penalties

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

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Amount of expense 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.

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