Income Taxes - Deferred Tax Assets Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 3,676,333	$ 3,618,227
Equity compensation	822	1,594
Deferred revenue	775	3,878
Tax credit and other attribute carryforwards	84,624	84,502
Insurance loss reserves	2,909	2,086
Depreciation and amortization for tax in excess of book expense	118,151	44,837
Other	131,223	110,003
Subtotal	4,014,837	3,865,127
Valuation allowance	(3,754,207)	(3,602,144)
Deferred tax assets	260,630	262,983
Deferred tax liabilities:
Other	4,772	17,388
Deferred tax liability	4,772	17,388
Net deferred tax assets (liabilities)	255,858	245,595
Balance Sheet Summary :
Net noncurrent deferred tax asset	258,631	247,171
Net noncurrent deferred tax liability	(2,773)	(1,576)
Net deferred tax asset (liability)	$ 255,858	$ 245,595