Leases - Future Minimum Cash Outflow and Weighted-average Remaining Lease Term and Discount Rate (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Future minimum lease payments finance lease
2019	$ 2,802
2020	5,720
2021	5,848
2022	5,980
2023	6,114
Thereafter	85,905
Total lease payments	112,369
Less interest portion	(63,820)
Finance lease obligations	48,549
Future minimum lease payments operating lease
2019	1,894
2020	3,155
2021	1,453
2022	374
2023	44
Thereafter	21
Total lease payments	6,941
Less interest portion	(532)
Operating lease obligations	6,409
Future minimum lease payments finance and operating lease
2019	4,696
2020	8,875
2021	7,301
2022	6,354
2023	6,158
Thereafter	85,926
Total lease payments	119,310
Less interest portion	(64,352)
Total lease liabilities	$ 54,958
Lease term and discount rate
Operating leases -Weighted-average remaining lease term (in years)	2 years 2 months 12 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