Leases - Balance Sheet (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Assets:
Finance lease assets, net (included in property and equipment)	$ 74,154
Operating lease right-of-use asset	122,701
Total lease assets	196,855
Liabilities:
Current finance lease liability	17,658
Current operating lease liability	36,797
Long-term finance lease liability	56,334
Long-term operating lease liability	90,767
Total lease liabilities	$ 201,556