CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities
Net loss	$ (32,444)	$ (24,684)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	12,430	12,291
Provision for doubtful accounts	238	424
Deferred income taxes	1,302	(11,897)
Loss on disposal or impairment of assets	0	948
Foreign currency transaction loss (gain), net	5	(129)
Stock compensation expense	1,348	1,564
Change in fair value of derivative instruments	385	(784)
Changes in operating assets and liabilities:
Trade accounts and other receivables	(5,794)	23,339
Inventories	5,455	(5,937)
Prepaid expenses and other current assets	(650)	169
Accounts payable	(1,475)	(439)
Accrued expenses	785	(2,879)
Income tax receivable, net	(1,377)	(277)
Other, net	721	(4)
Net cash used in operating activities	(19,071)	(8,295)
Investing activities
Capital expenditures	(634)	(6,088)
Net cash used in investing activities	(634)	(6,088)
Financing activities
Repayments on long-term debt	(3,250)	(23,000)
Repayments on insurance financing agreement	(462)	0
Payments of debt issuance costs	(875)	0
Purchase of common stock	(518)	(418)
Net cash used in financing activities	(5,105)	(23,418)
Effect of exchange rate changes on cash	513	397
Net decrease in cash and cash equivalents and restricted cash	(24,297)	(37,404)
Cash and cash equivalents and restricted cash at beginning of period	91,680	78,866
Cash and cash equivalents and restricted cash at end of period	67,383	41,462
Supplemental cash flow information
Interest paid	761	966
Income taxes paid	$ 0	$ 0