Leases - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Operating Leases Maturities:
2019 (October - December)	$ 2,374
2020	9,589
2021	9,818
2022	10,266
2023	10,393
Thereafter	57,225
Total Lease Payments	99,665
Less: Imputed Interest	33,716
Total Lease Obligations	65,949	$ 70,657
Finance Leases Maturities:
2019 (October - December)	1,108
2020	4,493
2021	4,514
2022	4,639
2023	4,776
Thereafter	39,908
Total Lease Payments	59,438
Less: Imputed Interest	13,685
Total Lease Obligations	$ 45,753