Financing and Operating Leases - Operating and Financing Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases
Operating lease right-of-use assets, net of amortization	$ 5,956	$ 6,312
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, Equipment and Operating Lease Right-of-Use Asset
Operating lease liability (current)	$ 2,401	2,283
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current
Long-term operating liability	$ 4,548	5,067
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total operating lease liabilities	$ 6,949	7,350
Property, equipment and leasehold improvements	81,093	80,577
Accumulated depreciation	(47,121)	(44,801)
Total property, equipment and leasehold improvements, net	39,928	42,088
Financing lease liability (current)	$ 2,274	2,211
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current
Long-term financing liability	$ 3,460	3,886
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total financing lease liabilities	$ 5,734	6,097
Adjustments | 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	8,507	8,256
Accumulated depreciation	(1,421)	(1,094)
Total property, equipment and leasehold improvements, net	$ 7,086	$ 7,162
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, Equipment and Operating Lease Right-of-Use Asset