Stock Compensation Plans and Share-Based Compensation Awards - RSUs (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock Compensation Plans and Share-Based Compensation Awards
Share-based compensation expense	$ 7,707	$ 6,489	$ 14,710	$ 12,287
Service-Based Restricted Stock Units
Stock Compensation Plans and Share-Based Compensation Awards
Share-based compensation expense	4,500	3,200	8,300	5,700
Unrecognized compensation expense	$ 35,700	$ 28,900	$ 35,700	$ 28,900
Weighted average period outstanding for unvested RSUs			2 years 3 months 18 days	2 years 4 months 24 days
Fair value of share based awards vested			$ 12,200	$ 7,800
Number outstanding
Balance at beginning of period (in shares)			1,339
Granted (in shares)			956
Vested (in shares)			(547)
Forfeited (in shares)			(38)
Balance at end of period (in shares)	1,710		1,710
Weighted average grant date fair value
Balance at beginning of period (in dollars per share)			$ 24.35
Granted (in dollars per share)			23.60
Vested (in dollars per share)			22.37
Forfeited (in dollars per share)			24.24
Balance at end of period (in dollars per share)	$ 24.55		$ 24.55
Service-Based Restricted Stock Units | Executive Officers
Stock Compensation Plans and Share-Based Compensation Awards
Vesting period			3 years
Service-Based Restricted Stock Units | Maximum
Stock Compensation Plans and Share-Based Compensation Awards
Vesting period			4 years
Service-Based Restricted Stock Units | Minimum
Stock Compensation Plans and Share-Based Compensation Awards
Vesting period			3 years