Stock-based Compensation - Stock Options Activity (Details) - Share-based Payment Arrangement, Option - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Shares
Balance at the beginning of the period (in shares)	50,000	364,153	2,620,295
Granted (in shares)	0	0	0
Exercised (in shares)	(50,000)	(314,153)	(2,256,142)
Forfeited/canceled (in shares)	0	0	0
Balance at the end of the period (in shares)	0	50,000	364,153	2,620,295
Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 28.80	$ 22.90	$ 20.40
Granted (in dollars per share)	0	0	0
Exercised (in dollars per share)	28.80	21.96	20.00
Forfeited/canceled (in dollars per share)	0	0	0
Balance at the end of the period (in dollars per share)	$ 0	$ 28.80	$ 22.90	$ 20.40
Remaining Contractual Term (in years)
Remaining Contractual Term (in years)	0 years	3 months 25 days	9 months	1 year 5 months 26 days
Aggregate Intrinsic Value (in thousands)
Balance at the beginning of the period	$ 781	$ 8,965	$ 25,697
Exercised	993	3,972	46,358
Balance at the end of the period	$ 0	$ 781	$ 8,965	$ 25,697