Leases - Assets and Liabilities (Details) $ in Thousands	Jun. 30, 2019 USD ($)
ROU assets:
Operating lease ROU assets	$ 56,098
Finance lease ROU assets	61,770
Total ROU assets	117,868
Operating lease liabilities:
Current operating lease liabilities	12,092
Noncurrent operating lease liabilities	52,186
Total operating lease liabilities	64,278
Finance lease liabilities:
Current finance lease liabilities	5,748
Noncurrent finance lease liabilities	33,816
Total finance lease liabilities	$ 39,564