Income Taxes - Activity with Respect to 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]
Beginning Balance	$ 20,690	$ 22,050	$ 22,888
Tax positions taken during a prior period	1,675	195	1,042
Tax positions taken during the current period	870	759	2,434
Settlements with taxing authorities	186	(1,027)	(2,487)
Lapse of statute of limitations	(1,130)	(1,287)	(1,827)
Ending Balance	$ 22,291	$ 20,690	$ 22,050