Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flow from operating activities:
Net income (loss)	$ 744,602	$ 854,219	$ 7,983
Adjustments to reconcile net income (loss) to cash provided by operations:
Depreciation and amortization	61,819	66,413	66,443
Impairment of long-lived assets	0	0	5,300
Related party Tax Receivable Agreement expense	3,393	86,478	0
Deferred income tax provision	17,503	(37,078)	(15,695)
Loss on extinguishment of debt	0	23,827	0
Non-cash interest expense	6,344	5,320	6,805
Other charges, net	21,831	15,761	(9,607)
Net change in working capital	(47,687)	(177,754)	(20,004)
Change in long-term assets and liabilities	(2,489)	(583)	(4,652)
Net cash provided by operating activities	805,316	836,603	36,573
Cash flow from investing activities:
Capital expenditures	(64,103)	(68,221)	(34,664)
Cash received from divestitures	0	0	27,254
Proceeds from the sale of fixed assets	219	926	5,211
Net cash used in investing activities	(63,884)	(67,295)	(2,199)
Cash flow from financing activities:
Short-term debt (reductions) borrowings, net	0	(12,607)	5,110
Credit Facility borrowings	0	0	77,000
Credit Facility reductions	0	(45,692)	(114,839)
Repayment of Senior Notes	0	(304,782)	0
Related Party Stock Repurchase	(250,000)	(225,000)	0
Principal payments on long-term debt	(350,140)	(56,372)	(266)
Related-party promissory note repayment	(10,868)	0	0
Refinancing fees and debt issuance costs	0	(27,326)	0
Net cash (used in) provided by financing activities	(709,631)	(731,044)	(32,995)
Payments of Dividends	(20,613)	(55,616)	0
Net change in cash and cash equivalents	31,801	38,264	1,379
Effect of exchange rate changes on cash and cash equivalents	(746)	(1,749)	376
Cash and cash equivalents at beginning of period	49,880	13,365	11,610
Cash and cash equivalents at end of period	80,935	49,880	13,365
Supplemental disclosures of cash flow information:
Interest	121,075	108,006	25,277
Income taxes	99,278	21,444	3,467
Non-cash financing activities:
Dividend payable - Promissory Note	0	750,000	0
Decrease (increase) in current assets:
Accounts and notes receivable, net	(404)	(139,180)	29,755
Inventories	(21,549)	(126,355)	15,649
Prepaid expenses and other current assets	3,929	7,116	10,565
Increase (Decrease) in Income Taxes Payable	(18,174)	67,054	2,762
Accounts payable and accruals	(11,551)	15,724	33,317
Interest payable	62	(2,113)	(114)
Net change in working capital	(47,687)	(177,754)	(20,004)
Proceeds from Issuance of Secured Debt	0	2,235,000	0
Payment Of Dividends- Related Party	(78,010)	(1,488,649)	0
Repayments of Related Party Debt	$ 0	(750,000)	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 49,880	$ 13,365