Stock-Based Compensation Plans - Stock Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation plans
Total Stock Compensation Expense	$ 3,041	$ 4,536	$ 7,670	$ 7,298
Employee Stock Purchase Plan
Stock-based compensation plans
Total Stock Compensation Expense	14	72	36	150
2007 Stock Incentive Plan
Stock-based compensation plans
Total Stock Compensation Expense	0	957	0	1,642
2021 Stock Incentive Plan
Stock-based compensation plans
Total Stock Compensation Expense	$ 3,027	$ 3,507	$ 7,634	$ 5,506