Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended
	Dec. 31, 2013	Aug. 01, 2015	Jun. 30, 2015	Dec. 10, 2014	Mar. 31, 2014
Equity [Abstract]
Shares authorized to purchase under stock repurchase program, value	$ 30,000,000		$ 50,000,000	$ 30,000,000	$ 30,000,000
Stock repurchase program expiration date	Jan. 30, 2016
Remaining value of shares authorized to purchase under stock repurchase program		$ 16,700,000