Income Taxes - Deferred Tax Assets Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 2,834,851	$ 1,967,910
Equity compensation	6,577	7,038
Deferred revenue	8,873	16,494
Tax credit and other attribute carryforwards	97,215	100,752
Insurance loss reserves	2,248	2,451
Accrued interest	172,120	206,088
Other	95,588	82,167
Subtotal	3,217,472	2,382,900
Valuation allowance	(2,813,567)	(1,917,390)
Deferred tax assets	403,905	465,510
Deferred tax liabilities:
Depreciation and amortization for tax in excess of book expense	80,155	102,810
Other	21,055	23,920
Deferred tax liability	101,210	126,730
Net deferred tax assets (liabilities)	302,695	338,780
Balance Sheet Summary :
Deferred income taxes	305,844	345,091
Net noncurrent deferred tax liability	$ (3,149)	$ (6,311)