Income Taxes - Components of Changes in 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 - January 1	$ 3,002	$ 4,440	$ 4,433
Gross increases - tax positions in current period			7
Gross increases - tax positions in prior period	560
Gross decreases - tax positions in prior period	(1,538)	(1,438)
Unrecognized tax benefits - December 31	2,024	3,002	4,440
Amount of unrecognized tax benefit that, if recognized would affect the company's effective tax rate	$ 2,024	$ 3,002	$ 4,440