Stockholders' Equity - Additional Information (Detail) - USD ($)		12 Months Ended
	May 27, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Aug. 02, 2019	Dec. 31, 2016
Stockholders Equity [Line Items]
Common stock, shares issued		94,044,203	93,400,929
Treasury stock, shares		15,790,463	10,174,589
Repurchase of treasury shares, shares		5,615,874	3,654,816
Stock repurchased during period, total cost		$ 150,000,000	$ 98,032,000
Treasury stock at cost		402,903,000	$ 252,903,000
Dividends paid to common stockholders				$ 1,500,000
Share Repurchase Program [Member]
Stockholders Equity [Line Items]
Share Repurchase Program, authorized amount		$ 250,000,000.0
Repurchase of treasury shares, shares			3,654,816
Stock repurchased during period, total cost			$ 98,000,000.0
Stock Repurchase Program, number of shares repurchased	5,615,874	5,615,874		0
Stock Repurchase Program, replenishment amount					$ 150,000,000.0
Stock Repurchase Program, remaining available for future		$ 250,000,000.0
Common Stock [Member]
Stockholders Equity [Line Items]
Common stock, shares issued		94,044,203	93,400,929	92,637,403		91,861,054
Number of unvested shares		474,460
Restricted Stock Units [Member]
Stockholders Equity [Line Items]
Number of unvested shares		2,440,952