Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (145,812)	$ (17,039)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	25,502	30,782
Impairment charges	144,120	0
Deferred income tax benefit	(8,941)	(4,745)
Non-cash compensation charge	2,208	2,534
Gains on disposals of assets	(21)	(1,452)
Provision (benefit) for loss on receivables, net of recoveries	54	(32)
Other, net	693	(410)
Changes in operating assets and liabilities:
Accounts receivable	(1,496)	(2,377)
Inventories	(740)	87
Accounts payable and accrued liabilities	6,280	(1,417)
Taxes payable	133	262
Other current and noncurrent assets and liabilities, net	(1,143)	148
Net cash flows provided by operating activities	20,837	6,341
Cash flows from investing activities:
Capital expenditures	(2,651)	(9,679)
Proceeds from disposition of property, plant and equipment	72	4,457
Other, net	0	1,518
Net cash flows used in investing activities	(2,579)	(3,704)
Cash flows from financing activities:
Revolving credit borrowings	74,287	80,324
Revolving credit repayments	(80,367)	(74,928)
Term loan repayments	(8,109)	(8,608)
Taxes paid on vested shares	(1,442)	(4,282)
Net cash flows used in financing activities	(15,631)	(7,494)
Effect of exchange rate changes on cash	(400)	477
Net change in cash and cash equivalents	2,227	(4,380)
Cash and cash equivalents, beginning of period	3,331	12,372
Cash and cash equivalents, end of period	5,558	7,992
Non-cash financing activities:
Preferred dividends paid-in-kind	$ 468	$ 459