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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 13,045	$ (64,079)	$ (39,755)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	57,618	58,444	59,768
Asset impairment	0	9,917	0
Deferred income tax provision	(2,291)	785	(680)
Loss on senior note repurchase	0	18,646	0
Stock-based compensation	1,130	1,539	1,993
Issuance of treasury stock under 401(k) plan	561	540	518
Foreign currency translation loss	3,149	5,258	9,734
(Increase) decrease in assets:
Accounts receivable	(36,092)	(38,478)	4,007
Inventories	(77,919)	(55,562)	7,992
Prepaid and other current assets	(5,377)	9,277	(16,718)
Other long-term assets	(13,054)	15,134	(109)
Increase (decrease) in liabilities:
Accounts payable	29,364	37,584	20,953
Other current liabilities	(2,866)	9,522	3,635
Other liabilities	(3,444)	(9,816)	(7,838)
Net cash provided by (used for) operating activities	(36,176)	(1,289)	43,500
Cash flows from investing activities:
Capital expenditures	(39,000)	(32,626)	(41,948)
Proceeds from Sale and Maturity of Marketable Securities	0	50,000
Payments to Acquire Restricted Certificates of Deposit			(50,000)
Other	2,069	993	2,222
Net cash provided by (used for) investing activities	(36,931)	18,367	(89,726)
Cash flows from financing activities:
Proceeds from borrowings	57,294	447,639	17,285
Repurchase of senior secured notes	0	415,395	0
Payment on debt	(38,557)	(55,160)	(22,634)
Dividends paid	(1,201)	(1,167)	(1,081)
Net cash used for financing activities	17,536	(24,083)	(6,430)
Effect of exchange rate changes on cash	(6,314)	2,748	295
Net decrease in cash and cash equivalents	(61,885)	(4,257)	(52,361)
Cash and cash equivalents, beginning of year	143,570	147,827	200,188
Cash and cash equivalents, end of year	81,685	143,570	147,827
Supplemental Cash Flow Information [Abstract]
Interest paid	30,800	38,164	34,380
Income taxes paid, net of refunds received	12,435	4,594	5,463
Transfer from Investments	14,268	0	0
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Issuance of common stock for convertible debt payment	$ 0	$ 58,460	$ 0

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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

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No definition available.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of cash outflow for the payment of debt classified as other.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Value of investments transferred from the entity's investments in noncash transactions.

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