Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income (loss)	$ (8,101)	$ 19,726
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	38,760	50,606
Stock-based compensation	7,997	9,454
Amortization of prepaid debt fees	1,579	808
Deferred taxes, net	1,901	(8,046)
Goodwill impairment	0	977
Restructuring expense, non-cash	267	0
Other adjustments, net	919	85
Changes in operating assets and liabilities:
Accounts receivable	(6,849)	(14,712)
Inventories	(49,677)	(16,801)
Other current assets	(9,043)	(9,103)
Other long-term assets	406	312
Accounts payable, other current liabilities, and taxes payable	23,990	12,360
Wages and benefits payable	(6,276)	4,473
Unearned revenue	7,807	16,560
Warranty	23,119	(2,864)
Other operating, net	(9,232)	3,356
Net cash provided by operating activities	17,567	67,191
Investing activities
Acquisitions of property, plant, and equipment	(20,992)	(19,403)
Other investing, net	693	56
Net cash used in investing activities	(20,299)	(19,347)
Financing activities
Proceeds from borrowings	74,183	0
Payments on debt	(22,373)	(51,250)
Issuance of common stock	1,864	1,530
Repurchase of common stock	(23,185)	(7,164)
Other financing, net	(3,942)	1,204
Net cash provided by (used in) financing activities	26,547	(55,680)
Effect of foreign exchange rate changes on cash and cash equivalents	(7,372)	(2,189)
Increase (decrease) in cash and cash equivalents	16,443	(10,025)
Cash and cash equivalents at beginning of period	112,371	124,805
Cash and cash equivalents at end of period	128,814	114,780
Non-cash transactions:
Property, plant, and equipment purchased but not yet paid	1,447	2,445
Supplemental disclosure of cash flow information:
Income taxes, net	21,233	3,502
Interest, net of amounts capitalized	$ 4,998	$ 4,911