Leases - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating Leases Maturities:
2019 (July - December)	$ 4,741
2020	9,589
2021	9,818
2022	10,266
2023	10,393
Thereafter	57,225
Total Lease Payments	102,032
Less: Imputed Interest	34,574
Total Lease Obligations	67,457	$ 70,657
Finance Leases Maturities:
2019 (July - December)	2,310
2020	4,493
2021	4,514
2022	4,639
2023	4,776
Thereafter	39,908
Total Lease Payments	60,640
Less: Imputed Interest	14,204
Total Lease Obligations	$ 46,436