Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Shares purchased under share repurchase plan, shares	1,356,861	1,473,863	4,353,801
Shares purchased under share repurchase plan, value	$ 63,102	$ 54,373	$ 160,200