Stockholders' Equity - Schedule of Stock Repurchases (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Total cost	$ 353,451	$ 105,941	$ 55,738
2016 Stock Repurchase Program
Class of Stock [Line Items]
Shares of common stock repurchased and retired (in shares)	3,269	1,258	756
Average price paid per share (in dollars per share)	$ 108.11	$ 84.16	$ 53.88
Total cost	$ 353,385	$ 105,915	$ 40,722