Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)	$ (46,741,000)	$ (262,987,000)	$ 162,237,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of continuing operations	91,846,000	71,128,000	52,406,000
Depreciation and amortization of discontinued operations	0	0	7,722,000
Amortization of debt issuance costs	4,789,000	4,845,000	4,296,000
Goodwill impairment	0	182,542,000	0
Other impairments	643,000	21,825,000	0
Loss on extinguishment of debt and write-off of debt issuance costs	3,293,000	19,562,000	42,087,000
Total derivative mark-to-market loss (gain), net of cash settlements	0	0	(1,483,000)
Share of net income from joint venture, net of cash dividends received	(1,681,000)	642,000	(1,284,000)
Gain on disposal of discontinued operations, net of tax and cost to sell	0	0	(133,665,000)
Compensation expense from issuance of share-based awards	2,822,000	2,416,000	4,730,000
Deferred income taxes	3,142,000	22,402,000	23,195,000
Other	3,169,000	1,290,000	100,000
Changes in operating assets and liabilities, excluding acquisitions:
Accounts receivable	1,265,000	(3,543,000)	(11,374,000)
Inventories	1,426,000	(16,208,000)	(8,944,000)
Accounts payable	7,900,000	(2,693,000)	(4,118,000)
Income taxes receivable and payable, net	5,292,000	(39,615,000)	124,389,000
Other	4,711,000	(479,000)	(1,595,000)
Net cash provided by (used in) operating activities	49,208,000	40,939,000	(28,233,000)
Cash flows from investing activities
Acquisition of property, plant and equipment, excluding assets acquired in business combinations	(54,003,000)	(64,036,000)	(43,722,000)
Proceeds from liquidation of short-term investment	8,000,000	0	(8,000,000)
Proceeds from sale of business, net of cash sold	0	838,000	371,436,000
Cash paid to acquire businesses, net of cash received	0	(399,009,000)	(38,434,000)
Proceeds from sale of property, plant, and equipment	7,287,000	1,434,000	646,000
Other	(711,000)	(517,000)	545,000
Net cash provided by (used in) investing activities	(39,427,000)	(461,290,000)	282,471,000
Cash flows from financing activities
Cash paid for debt issuance or prepayment costs	(11,336,000)	(20,726,000)	(40,235,000)
Dividends paid	(8,879,000)	(8,826,000)	(7,695,000)
Proceeds from issuance of common stock	0	217,312,000	0
Proceeds from issuance of preferred stock	95,741,000	0	0
Proceeds from long-term debt	54,209,000	311,841,000	322,000,000
Repayment of long-term debt	(108,157,000)	(290,687,000)	(314,313,000)
Proceeds from (repayments of) short-term debt, net	(12,564,000)	10,305,000	(4,211,000)
Other	3,715,000	4,126,000	1,382,000
Net cash provided by (used in) financing activities	5,299,000	215,093,000	(45,836,000)
Effect of exchange rate changes on cash flows	(1,365,000)	(1,200,000)	1,639,000
Net change in cash and cash equivalents	13,715,000	(206,458,000)	210,041,000
Cash and cash equivalents at beginning of period	17,988,000	224,446,000	14,405,000
Cash and cash equivalents at end of period	31,703,000	17,988,000	224,446,000
Supplemental schedule of non-cash operating, investing and financing activities:
Dividends accrued (reversed) for performance share units, net	(11,000)	(83,000)	192,000
Non-cash additions to property, plant and equipment	23,281,000	26,605,000	1,436,000
Restructuring charges in other current and non-current liabilities	(12,000)	2,071,000	222,000
Supplemental disclosures:
Cash paid for interest	50,514,000	56,223,000	52,083,000
Cash paid (received) for income taxes	$ 6,428,000	$ (32,582,000)	$ 72,294,000