Leases - Operating and Finance Lease Maturities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Document Period End Date	Jun. 30, 2020
Operating
2020	$ 491
2021	906
2022	627
2023	607
2024	494
2025 and thereafter	1,179
Total lease payments	4,304
Less: Imputed interest	(561)
Total operating lease liabilities	3,743	$ 3,608	$ 78,400
Less: Current obligations	(1,213)	(1,126)
Long-term lease obligations	2,530	2,482
Finance
2020	3,865
2021	7,411
2022	7,285
2023	7,332
2024	6,856
2025 and thereafter	80,313
Total lease payments	113,062
Less: Imputed interest	(39,730)
Total finance lease liabilities	73,332	73,699
Less: Current obligations	(3,293)	(3,224)
Long-term lease obligations	$ 70,039	$ 70,475