Stock Repurchase Program - Additional Information (Detail) (USD $) Share data in Thousands, unless otherwise specified	0 Months Ended	1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 19, 2013	Dec. 31, 2007	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2008
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program	$ 23,100,000	$ 5,000,000			$ 16,100,000
Additional authorized amount stock repurchase program	7,000,000
Stock repurchase program expiration date			Sep. 20, 2013
Repurchase of common stock			0	164
Aggregate purchase price common stock, shares				$ 661,000
Prior Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program expiration date			Sep. 19, 2014