Reconciliation of Total Amounts 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]
Balance at beginning of period	$ 7,097	$ 11,669	$ 12,505
Gross increases-tax positions in prior years	559	352	564
Gross decreases-tax positions in prior years	(369)	(273)	(1,061)
Gross increases-tax positions in current year	38	42	40
Settlements		(252)	(111)
Lapse of statute of limitations	(1,215)	(4,441)	(268)
Balance at end of period	$ 6,110	$ 7,097	$ 11,669