Income Taxes - Reconciliation of Beginning and Ending Amounts of 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]
Unrecognized Tax Benefits, Beginning Balance	$ 33,220	$ 32,795	$ 41,386
Increases related to current and prior year tax positions	2,653	475	899
Settlements and lapses in statutes of limitations	(373)	(50)	(9,490)
Unrecognized Tax Benefits, Ending Balance	$ 35,500	$ 33,220	$ 32,795