Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net (loss) income	$ (329,757)	$ (200,821)	$ 145,206
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation, depletion and amortization	179,444	148,832	97,233
Goodwill and other asset impairments	363,847	281,899	0
Debt issuance amortization	5,597	4,044	1,382
Original issue discount amortization	1,053	832	372
Gain on valuation change of royalty note payable	(16,854)	0	0
Inventory step-up adjustments	22,373	20,107	3,812
Deferred income taxes	(101,682)	(31,070)	(20,601)
Deferred revenue	(74,910)	(36,720)	28,438
(Loss) gain on disposal of property, plant and equipment	1,573	(5,170)	415
Equity-based compensation	15,906	22,337	25,050
Bad debt provision, net of recoveries	3,466	315	1,529
Other	(12,042)	(13,536)	13,929
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	33,837	56,815	(110,920)
Inventories	11,182	(7,022)	(8,637)
Prepaid expenses and other current assets	8,547	(2,678)	8,787
Income taxes	1,725	(3,764)	1,469
Accounts payable and accrued expenses	21,024	26,907	43,654
Short-term and long-term obligations-vendor incentives	4,021	52,806	0
Liability for pension and other post-retirement benefits	2,734	4,608	(705)
Other noncurrent assets and liabilities	2,962	(8,015)	(8,400)
Net cash provided by operating activities	144,046	310,706	222,013
Investing activities:
Capital expenditures	(118,357)	(339,815)	(368,479)
Capitalized intellectual property costs	(3,932)	(10,046)	(3,586)
Acquisition of businesses, net of cash acquired	0	(743,249)	(119,801)
Proceeds from sale of property, plant and equipment	1,896	26,231	337
Net cash used in investing activities	(120,393)	(1,066,879)	(491,529)
Financing activities:
Dividends paid	(18,592)	(19,912)	(20,377)
Repurchase of common stock	0	(148,469)	(25,022)
Proceeds from options exercised	128	61	798
Tax payments related to shares withheld for vested restricted stock and stock units	(2,993)	(4,383)	(4,379)
Proceeds from long-term debt	0	1,280,000	0
Payments on long-term debt	(23,449)	(501,425)	(7,211)
Financing fees paid	0	(38,701)	0
Contributions from non-controlling interest	4,554	7,497	0
Principal payments on capital lease obligations	(59)	(564)	(951)
Net cash (used in) provided by financing activities	(40,411)	574,104	(57,142)
Net decrease in cash and cash equivalents	(16,758)	(182,069)	(326,658)
Cash and cash equivalents, beginning of period	202,498	384,567	711,225
Cash and cash equivalents, end of period	185,740	202,498	384,567
Cash paid (received) during the period for:
Interest	87,286	66,769	24,490
Taxes, net of refunds	(14,741)	5,373	8,958
Related party purchases	0	2,958	4,942
Non-cash Items:
Equipment received	0	0	18,185
Accrued capital expenditures	27,646	36,008	16,534
Capital lease assumed by third-party	0	119	0
Asset retirement obligation assumed by third-party	$ 0	$ 2,116	$ 0