Leases - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Operating lease assets, gross	$ 634,441
Accumulated lease expense	(87,438)
Accumulated impairment	(62,865)
Total operating lease assets	484,138	$ 563,372
Finance lease assets, gross	8,842
Accumulated depreciation	(2,559)
Total finance lease assets	6,283
Total lease assets	490,421
Current
Current portion of operating lease liabilities	74,106	74,279
Finance leases	1,920
Non-current
Long-term operating lease liabilities	516,681	$ 532,977
Finance leases	3,864
Total lease liabilities	$ 596,571