Stockholder's Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands			3 Months Ended
	Mar. 31, 2018	Mar. 02, 2018	Mar. 31, 2018
Statement Of Shareholders Equity [Line Items]
Effective portion of unrealized gain on derivative instruments	$ 1,800,000		$ 1,160,000
Share repurchase, amount			$ 24,640,000
2018 Stock Repurchase Plan [Member]
Statement Of Shareholders Equity [Line Items]
Common Stock Repurchase, Shares		50	413
Stock repurchase program, authorized		$ 50,000,000
Share repurchase, amount			$ 24,600,000
Share repurchase, price per share			$ 59.70