Common Stock Repurchase Program - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	67 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Aug. 28, 2008 Maximum
Equity, Class of Treasury Stock [Line Items]
Board of Directors authorized the repurchase of common stock			2,000,000
Repurchased and retired, shares	36,969	1,989,545
Repurchased and retired, aggregate purchase price	$ 4,062	$ 88,196