Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease Right-of-Use Assets, Net	$ 133,365	$ 0
Property and Equipment, Net	3,647
Total lease assets	137,012
Operating lease liabilities, current portion	35,210	0
Current portion of finance liabilities, long-term debt and non-recourse debt	1,519
Long-term lease obligations	102,238	0
Long-term lease obligations	4,179	$ 4,570
Total lease liabilities	$ 143,146