Stockholders' Equity - Additional Information (Detail) - USD ($)		12 Months Ended
	Aug. 16, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 21, 2019	Aug. 13, 2018	Dec. 01, 2017	May 18, 2017	Jun. 02, 2016
Stockholders Equity [Line Items]
Total cost		$ 105,941,000	$ 55,738,000	$ 168,094,000
2016 Stock Repurchase Program
Stockholders Equity [Line Items]
Share repurchase program authorized amount					$ 400,000,000.0				$ 100,000,000.0
Stock repurchase program additional amount authorized					$ 100,000,000.0		$ 100,000,000.0	$ 100,000,000.0
Available amount under repurchase program		$ 66,600,000
Shares of common stock repurchased and retired (in shares)		1,258,000	756,000	4,674,000
Average price per share (in dollars per share)		$ 84.16	$ 53.88	$ 35.94
Total cost		$ 105,915,000	$ 40,722,000	$ 168,001,000
2018 Stock Repurchase Program
Stockholders Equity [Line Items]
Share repurchase program authorized amount						$ 25,000,000.0
Shares of common stock repurchased and retired (in shares)	196,050
Average price per share (in dollars per share)	$ 76.51
Total cost	$ 15,000,000.0