Leases - Annual future commitments under non-cancelable leases - ASC 840 (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
2020			$ 3,318
2021			2,685
2022			1,894
2023			1,765
2024			1,478
Thereafter			134
Operating Leases, Total minimum future obligations			11,274
Capital Leases
2020			1,615
2021			1,296
2022			605
2023			433
2024			123
Capital Leases, Total minimum future obligations			4,072
Less imputed interest			(298)
Total lease obligations			3,774
Less current lease obligations	$ (1,573)	$ (1,500)	(1,455)
Long-term lease obligations	$ 3,331	$ 2,319	$ 2,319