Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 28, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule Of Stockholders Equity [Line Items]
Aggregate value of all shares repurchased			$ 78,569	$ 95,227	$ 430,281
Share repurchase remaining authorization		$ 305,598		$ 305,598
Preferred stock, shares authorized		15,000,000		15,000,000		15,000,000
Preferred stock, par value		$ 0.01		$ 0.01		$ 0.01
Dividend declared per share of common stock		$ 0.47	$ 0.47	$ 1.41	$ 1.88
Subsequent Event [Member]
Schedule Of Stockholders Equity [Line Items]
Dividend declared per share of common stock	$ 0.47
Dividend payable date	Nov. 20, 2020
Dividend date of record	Nov. 09, 2020
Dividend declare date	Oct. 28, 2020
December 31, 2020 [Member]
Schedule Of Stockholders Equity [Line Items]
Share repurchase remaining authorization		$ 5,598		$ 5,598
Share repurchase authorization expiration date				Dec. 31, 2020
December 31, 2021 [Member]
Schedule Of Stockholders Equity [Line Items]
Share repurchase remaining authorization		$ 300,000		$ 300,000
Share repurchase authorization expiration date				Dec. 31, 2021
Common Stock [Member] | Executive Officers [Member]
Schedule Of Stockholders Equity [Line Items]
Aggregate value of all shares repurchased				$ 10,000	$ 14,600
Series A Preferred Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Preferred stock, shares outstanding		0		0		0
Series B Preferred Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Preferred stock, shares outstanding		0		0		0