Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (983)	$ (13,300)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	9,387	9,573
Stock-based compensation expense	2,836	2,974
Provision for deferred income taxes	(2,545)	(36)
Net provision for doubtful accounts	666	528
Gain on sale of assets	(847)	(1,271)
Gain on extinguishment of debt	0	(1,894)
Amortization of original issue discount and debt issuance costs	1,330	286
Change in assets and liabilities:
(Increase) decrease in receivables	(23,019)	27,606
(Increase) decrease in inventories	(829)	10,630
Decrease in other assets	521	1,381
Decrease in accounts payable	(1,692)	(20,028)
Increase (decrease) in accrued liabilities and other	3,731	(19,349)
Net cash used in operating activities	(11,444)	(2,900)
Cash flows from investing activities:
Capital expenditures	(7,291)	(13,418)
Increase in restricted cash	(46)	0
Proceeds from sale of property, plant and equipment	288	1,450
Net cash used in investing activities	(7,049)	(11,968)
Cash flows from financing activities:
Borrowings on lines of credit	0	2,479
Payments on lines of credit	0	(4,851)
Purchase of Convertible Notes due 2017	0	(9,206)
Debt issuance costs	(157)	0
Other financing activities	(371)	(3)
Proceeds from employee stock plans	211	0
Purchases of treasury stock	(48)	0
Net cash used in financing activities	(365)	(11,581)
Effect of exchange rate changes on cash	856	1,845
Net decrease in cash and cash equivalents	(18,002)	(24,604)
Cash and cash equivalents at beginning of year	87,878	107,138
Cash and cash equivalents at end of period	69,876	82,534
Cash paid for:
Income taxes (net of refunds)	1,845	1,555
Interest	$ 163	$ 494