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Long-Term Debt - Obligations Under Capital Lease (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Leases      
Average balance $ 11,340 $ 19,406  
Weighted average interest rate 2.13% 3.36%  
Total interest expense $ 59 $ 167  
Unpaid principal balance $ 10,468   $ 11,864
Weighted average interest rate 2.11%   2.15%
Capitalized software pledged to creditors $ 6,778   $ 7,675
Furniture, fixtures, equipment and building improvements pledged to creditors 5,294   $ 5,689
Maximum      
Leases      
Maximum daily amount outstanding $ 11,864 $ 20,810