Long-Term Debt - Obligations Under Capital Lease (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Leases
Average balance	$ 9,072	$ 17,272	$ 10,169	$ 18,367
Weighted average interest rate	2.10%	2.70%	2.12%	3.05%
Total interest expense	$ 48	$ 104	$ 107	$ 271
Unpaid principal balance	$ 7,677		$ 7,677		$ 11,864
Weighted average interest rate	2.07%		2.07%		2.15%
Capitalized software pledged to creditors	$ 6,024		$ 6,024		$ 7,675
Furniture, fixtures, equipment and building improvements pledged to creditors	4,899		4,899		$ 5,689
Maximum
Leases
Maximum daily amount outstanding	$ 10,468	$ 18,145	$ 11,864	$ 20,810