Stock Repurchase - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2016	Oct. 28, 2014
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program expiration date	Sep. 30, 2017
Minimum number of shares that company is required to repurchase	0
Stock repurchased under authorization	0
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased		1,500,000