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Income Taxes - Schedule of Activity Related to 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]
Balance at beginning of year	$ 13,072	$ 16,165	$ 22,290
Increases related to prior year tax positions	338	102	44
Decreases related to prior year tax positions	(38)
Increases related to current year tax positions	2,955	2,478	2,541
Decreases related to current year tax positions		(3,671)	(7,203)
Settlements			13
Decreases related to lapse of statutes of limitations	(1,425)	(2,002)	(1,520)
Balance at end of year	$ 14,902	$ 13,072	$ 16,165

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

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-Name Accounting Standards Codification

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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