Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 13,049	$ (22,085)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation & amortization expense	44,907	48,782
Loss on disposal of property, plant and equipment	1,353	1,033
Gain on extinguishment of debt	(66)	0
Amortization of debt discount and issuance costs	3,730	4,013
Stock-based compensation expense	5,471	2,661
Earnings from equity method investee	(5,925)	(4,969)
Distributions from equity method investee	4,500	1,500
Unrealized loss on derivative instruments, net	921	5,024
Unrealized foreign currency loss / (gain), net	212	(93)
Provision (recoveries) for doubtful accounts	80	(194)
Deferred taxes	1,816	(9,566)
Other non-cash items	2,088	919
Change in assets and liabilities:
Receivables, net	(66,160)	(67,813)
Inventories	(945)	(5,734)
Other current assets	2,435	(641)
Accounts payable and accrued liabilities	27,950	13,066
Other assets & liabilities	4,447	6,775
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	40,239	(27,322)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment, and intangible assets	(9,054)	(34,051)
Proceeds from sale of fixed assets	10,590	9,509
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	1,536	(24,542)
CASH FLOWS FROM FINANCING ACTIVITIES
Payment of debt issuance costs	(1,734)	0
Payments on term loans	(21,368)	(6,255)
Proceeds from revolver	180,000	54,000
Payments on revolver	(180,000)	(15,000)
Other financing activities	(454)	(395)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(23,556)	32,350
Effect of exchange rate changes on cash	(513)	512
Net change in cash and cash equivalents	17,706	(19,002)
Cash and cash equivalents, beginning of period	34,800	35,793
Cash and cash equivalents, end of period	52,506	16,791
SUPPLEMENTAL DISCLOSURES:
Cash interest paid	33,134	38,835
Income taxes paid (refunds received), net	(241)	3,911
Term Loan | Senior Notes
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Gain on extinguishment of debt	(66)	0
Write-off of debt discount and issuance costs	300
ABL Credit Agreement | Revolver | Revolving Line of Credit
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Write-off of debt discount and issuance costs	$ 376	$ 0