Income Taxes - Unrecognized Tax Benefits for Permanent and Temporary Book/Tax Differences for Continuing Operations, Exclusive of Interest (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 January 1	$ 5,138	$ 987	$ 9,237
Settlements for tax positions of prior years	(409)		(15,969)
Additions for tax positions of the current year	566	4,195	987
Additions for tax positions of prior years	1,054	181	7,837
Reductions for tax positions of prior years	(471)	(225)	(572)
Reductions for lapse of statute of limitations			(533)
Balance at December 31	$ 5,878	$ 5,138	$ 987