Leases - Operating and Finance Lease Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating
2019	$ 237
2020	897
2021	853
2022	509
2023	423
2024 and thereafter	1,534
Total lease payments	4,453
Less: Imputed interest	(651)
Total operating lease liabilities	3,802	$ 78,400
Less: Current obligations	(807)		$ 0
Long-term lease obligations	2,995		0
Finance
2019	1,856
2020	7,305
2021	6,856
2022	6,711
2023	6,755
2024 and thereafter	86,738
Total lease payments	116,221
Less: Imputed interest	(41,627)
Total finance lease liabilities	74,594
Less: Current obligations	(5,426)		(936)
Long-term lease obligations	$ 69,168		$ 867