Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 23,048	$ 760
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	7,748	7,803
Allowance for accounts receivable	3,829	1,998
Non-cash amortization of debt financing costs	701	523
Shared-based compensation expense	1,517	1,250
Deferred income taxes	6,676	(1,004)
Non-cash gain on derivative contracts	(2,161)	(1,236)
Change in other operating items:
Accounts receivable	(47,334)	(26,742)
Inventories	7,010	(8,148)
Prepaid expenses	(3,766)	(2,275)
Accounts payable	2,845	24,950
Other operating activities, net	788	(1,751)
Net cash provided by (used in) operating activities	901	(3,872)
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(5,158)	(7,768)
Proceeds from disposal/sale of property, plant and equipment	0	254
Net cash used in investing activities	(5,158)	(7,514)
Cash Flows from Financing Activities:
Borrowing of Revolving Credit Facility	80,500	0
Repayment of Revolving Credit Facility	(80,500)	0
Repayment of Term Loan	(2,188)	0
Borrowing of Term Loan	0	175,000
Repayment of 7.875% notes	0	(235,000)
Prepayment charge for redemption of 7.875% notes	0	(1,543)
Term Loan discount	0	(3,500)
Payment of debt issuance cost	0	(4,089)
Net cash used in financing activities	(2,188)	(69,132)
Effect of Foreign Currency Exchange Rate Changes on Cash	(1,125)	1,960
Net Decrease in Cash	(7,570)	(78,558)
Cash:
Beginning of period	52,244	130,160
End of period	44,674	51,602
Supplemental Cash Flow Information:
Cash paid for interest	6,937	10,531
Cash paid for income taxes, net	1,693	1,352
Unpaid purchases of property and equipment included in accounts payable	$ 416	$ 75