Leases - Future Minimum Cash Outflow and Weighted-average Remaining Lease Term and Discount Rate (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Future minimum lease payments finance lease
2019	$ 1,401
2020	5,720
2021	5,848
2022	5,980
2023	6,114
Thereafter	85,905
Total lease payments	110,968
Less interest portion	(62,419)
Finance lease obligations	48,549
Future minimum lease payments operating lease
2019	923
2020	3,283
2021	1,650
2022	508
2023	113
Thereafter	266
Total lease payments	6,743
Less interest portion	(625)
Operating lease obligations	6,118
Future minimum lease payments finance and operating lease
2019	2,324
2020	9,003
2021	7,498
2022	6,488
2023	6,227
Thereafter	86,171
Total lease payments	117,711
Less interest portion	(63,044)
Total lease liabilities	$ 54,667
Lease term and discount rate
Operating leases -Weighted-average remaining lease term (in years)	2 years 3 months 18 days
Finance leases - Weighted-average remaining lease term (in years)	17 years 7 months 6 days
Operating leases - Weighted-average discount rate	4.50%
Finance leases - Weighted-average discount rate	10.50%
Operating lease term	22 years
Minimum
Lease term and discount rate
Finance lease term	1 year
Maximum
Lease term and discount rate
Finance lease term	10 years