Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 268,777	$ (36,630)	$ (79,464)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	10,498	52,807	41,355
Deferred income taxes	54,322	(5,051)	3,882
Amortization of debt acquisition costs		82	16,522
Reduction in value of assets held for sale	(2,654)		46,358
Assets held for sale		(71)
Right-of-use assets amortization	1,372	2,544	4,373
Reorganization items, net	(354,279)
Retirement and deferred compensation plan expense, net	260	(2,007)	3,584
Bad debt	(210)	(4,398)
Gain on sale of assets and businesses	58	(2,673)
Other reconciling items, net	(307)	(710)	1,776
Changes in operating assets and liabilities:
Accounts receivable	3,602	2,414	(3,448)
Prepaid expenses	(340)	(4,625)	4,129
Inventory and other current assets	(221)	2,496	(2,077)
Accounts payable	(2,365)	4,592	(17,086)
Accrued expenses	24,425	9,857	(20,540)
Income taxes	340	5,134	(28,479)
Operating lease liabilities and other, net	2,105	(2,360)	(3,125)
Net cash provided by (used in) operating activities	5,383	21,401	(32,240)
Cash flows from investing activities:
Payments for capital expenditures	(3,035)	(4,119)	(18,563)
Proceeds from sales of assets	775	7,148	33,045
Net cash provided by (used in) investing activities	(2,260)	3,029	14,482
Cash flows from financing activities:
Credit facility costs	(1,920)	(14)
Tax withholdings for vested restricted stock units			(208)
Net cash used in financing activities	(1,920)	(14)	(208)
Effect of exchange rate changes on cash	311		(2,428)
Net change in cash, cash equivalents, and restricted cash	1,514	24,416	(20,394)
Cash, cash equivalents, and restricted cash at beginning of period	268,184	269,698	275,388
Cash, cash equivalents, and restricted cash at end of period	$ 269,698	$ 294,114	$ 254,994