Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net income (loss)	$ (118)	$ 3,496
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	25,592	24,757
Stock-based compensation	4,584	5,096
Amortization of prepaid debt fees	404	414
Deferred taxes, net	(3,915)	(9,227)
Goodwill, Impairment Loss	977	0
Restructuring expense, non-cash	0	26
Other adjustments, net	32	196
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	15,392	8,362
Inventories	(15,827)	(15,944)
Other current assets	(1,547)	(6,867)
Other long-term assets	892	3,549
Accounts payable, other current liabilities, and taxes payable	25,303	(14,629)
Wages and benefits payable	272	(6,546)
Unearned revenue	16,441	13,474
Warranty	675	(2,098)
Other operating, net	(2,396)	(3,464)
Net cash provided by operating activities	66,761	595
Investing activities
Acquisitions of property, plant, and equipment	(8,564)	(14,765)
Business acquisitions, net of cash and cash equivalents acquired	0	(860)
Other investing, net	167	56
Net cash used in investing activities	(8,397)	(15,569)
Financing activities
Payments on debt	(30,625)	(18,750)
Issuance of common stock	310	1,073
Repurchase of common stock	(2,948)	(200)
Other financing, net	(2,244)	634
Net cash used in financing activities	(35,507)	(17,243)
Effect of foreign exchange rate changes on cash and cash equivalents	(1,335)	(2,633)
Increase (decrease) in cash and cash equivalents	21,522	(34,850)
Cash and cash equivalents at beginning of period	124,805	136,411
Cash and cash equivalents at end of period	146,327	101,561
Non-cash transactions:
Property, plant, and equipment purchased but not yet paid	540	6,890
Supplemental disclosure of cash flow information:
Income taxes, net	(891)	2,671
Interest, net of amounts capitalized	$ 2,460	$ 1,867