Employee Stock Purchase Plan, Stock Options and Warrants - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Total intrinsic value of stock options exercised	$ 36,086	$ 11,733	$ 9,910
Cash received from stock option exercises	20,194	5,481	4,837
Excess tax benefit from the exercise of stock options	$ 5,571	$ 1,815	$ 1,654
Number of Shares
Beginning balance (in shares)	3,942
Granted (in shares)	716
Exercised (in shares)	(883)
Forfeited/expired (in shares)	(135)
Outstanding at December 31 (in shares)	3,640	3,942
Exercisable (in shares)	1,762
Ending vested and expected to vest (in shares)	3,537
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 35.98
Granted (in dollars per share)	66.60
Exercised (in dollars per share)	23.08
Forfeited/expired (in dollars per share)	47.60
Outstanding at December 31 (in dollars per share)	44.70	$ 35.98
Exercisable (in dollars per share)	35.86
Ending vested and expected to vest (in dollars per share)	$ 44.32
Outstanding, remaining contractual term	3 years 10 months 24 days
Exercisable, remaining contractual term	2 years 9 months 18 days
Ending vested and expected to vest, remaining contractual term	3 years 10 months 6 days
Outstanding, intrinsic value	$ 67,868
Exercisable, intrinsic value	46,601
Ending vested and expected to vest, intrinsic value	$ 67,063