Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Operating loss carryforwards	$ 281,384	$ 237,728
Operating lease obligations	208,460	322,122
Financing lease obligations	87,992	90,011
Accrued expenses	56,151	96,410
Intangible assets	50,576	60,069
Tax credits	50,415	50,356
Investment in unconsolidated ventures	0	5,105
Capital loss carryforward	2,205	2,263
Other	6,450	8,561
Total gross deferred income tax asset	743,633	872,625
Valuation allowance	(367,963)	(380,990)
Net deferred income tax assets	375,670	491,635
Deferred income tax liabilities:
Property, plant and equipment	(202,103)	(223,703)
Operating lease right-of-use assets	(158,237)	(277,489)
Investment in unconsolidated ventures	(15,051)	0
Total gross deferred income tax liability	(375,391)	(501,192)
Net deferred tax asset (liability)	$ 279
Net deferred tax asset (liability)		$ (9,557)