Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended
	Oct. 24, 2013 October 2013 Stock Repurchase Program [Member]	Mar. 31, 2014 October 2013 Stock Repurchase Program [Member]	Feb. 19, 2014 February 2014 Stock Repurchase Program [Member]	Mar. 31, 2014 February 2014 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized amount	$ 30		$ 50
Value of shares repurchased by the Company		0		0
Expiration date of authorized common stock repurchase program	Feb. 10, 2014