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Financing and Operating Leases - Operating and Financing Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Leases      
Operating lease right-of-use assets, net of amortization $ 7,183 $ 6,312  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PropertyPlantAndEquipmentOperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentOperatingLeaseRightOfUseAsset  
Operating lease liability (current) $ 2,267 $ 2,283  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current Accrued Liabilities, Current  
Long-term operating liability $ 5,491 $ 5,067  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other Liabilities, Noncurrent Other Liabilities, Noncurrent  
Total operating lease liabilities $ 7,758 $ 7,350  
Property, equipment and leasehold improvements 87,312 80,577  
Accumulated depreciation (55,092) (45,277)  
Total property, equipment and leasehold improvements, net 39,403 41,612  
Financing lease liability (current) $ 2,140 $ 2,211  
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current Accrued Liabilities, Current  
Long-term financing liability $ 3,052 $ 3,886  
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other Liabilities, Noncurrent Other Liabilities, Noncurrent  
Total financing lease liabilities $ 5,192 $ 6,097  
Adjustment | Accounting Standards Update 2016-02      
Leases      
Operating lease right-to-use assets     $ 8,025
Total operating lease liabilities     $ 8,813
Financing leases      
Leases      
Property, equipment and leasehold improvements 9,974 8,256  
Accumulated depreciation (2,422) (1,094)  
Total property, equipment and leasehold improvements, net $ 7,552 $ 7,162