Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Millions		12 Months Ended
	May 02, 2018 shares	Dec. 31, 2018 $ / shares shares	Dec. 31, 2016 USD ($) shares	Feb. 16, 2018 shares	Dec. 31, 2017 shares	Feb. 16, 2017 shares	Oct. 22, 2015 shares
Equity, Class of Treasury Stock [Line Items]
Common stock, par value | $ / shares		$ 0.01
Common stock, shares authorized	80,000,000	120,000,000			120,000,000
Stock split	2
October 2014 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, termination date		Oct. 22, 2015
October 2015 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, termination date		Dec. 31, 2016
Common stock repurchase program, authorized shares							3,150,000
Number of shares repurchased by the Company			1,578,952
Value of shares repurchased by the Company | $			$ 53.3
February 2017 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares						2,961,000
Number of shares repurchased by the Company		0
February 2018 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares				5,800,000
Number of shares repurchased by the Company		459,321