Leases Lessee Operating Lease Liability Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
2019 (April through December 2019 as of March 31, 2019)	$ 1,809
2020	1,949
2021	1,455
2022	1,065
2023	575
Thereafter	629
Total lease payments	7,482
Less: imputed interest	1,016
Total lease obligations	6,466
Less: current obligations	2,027	$ 0
Long-term lease obligations	$ 4,439	0
2019 (April through December 2019 as of March 31, 2019)		2,818
2020		2,530
2021		1,497
2022		1,007
2023		546
Thereafter		605
Total lease payments		$ 9,003