Common Stock - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Schedule Of Common Stock [Line Items]
Common stock, shares authorized | shares	250,000,000	250,000,000
Common stock, par value | $ / shares	$ 0.01	$ 0.01
Common stock voting rights	One vote for each share held on all matters submitted to a vote of stockholders. There are no cumulative voting rights with respect to the election of directors.
Senior leverage ratio	3.0
Share repurchase program, description	Under our credit facility, (described in Note 8, Debt and Financing Arrangements) share repurchases are unlimited when total leverage is less than 3.0. When leverage is greater than 3.0, the annual share repurchase is limited to $25.0 million
Stock repurchase program authorized to be repurchased | shares	900,000	3,800,000
Payment for acquisition of treasury stock | $	$ 9,100,000	$ 35,200,000
Maximum [Member]
Schedule Of Common Stock [Line Items]
Annual share repurchase limit | $	$ 25,000,000