Long-Term Debt - Credit Facility Net Interest Expense (Details) - Revolving Credit Facility - Line of Credit - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest Expense and Amortization of Debt Issue Costs
Interest expense	$ 0	$ 609	$ 0	$ 1,191
Debt issue cost amortization	0	275	0	550
Unused facility fee	334	206	634	419
Total	$ 334	$ 1,090	$ 634	$ 2,160