Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities
Net income	$ 15,692	$ 57,863
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	49,031	54,271
Stock-based compensation	10,122	9,256
Amortization of prepaid debt fees	829	763
Deferred taxes, net	(11,543)	628
Restructuring expense, non-cash	27	1,487
Other adjustments, net	324	(11)
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	(4,278)	8,046
Inventories	(25,124)	(2,786)
Other current assets	(9,408)	(13,663)
Other long-term assets	4,489	3,559
Accounts payable, other current liabilities, and taxes payable	(10,280)	(5,817)
Wages and benefits payable	(5,661)	(11,244)
Unearned revenue	10,497	5,627
Warranty	(1,797)	(11,991)
Other operating, net	(3,946)	(3,598)
Net cash provided by operating activities	18,974	92,390
Investing activities
Acquisitions of property, plant, and equipment	(28,895)	(23,547)
Business acquisitions, net of cash and cash equivalents acquired	(860)	(79,605)
Other investing, net	241	3,993
Net cash used in investing activities	(29,514)	(99,159)
Financing activities
Proceeds from borrowings	15,000	70,000
Payments on debt	(22,500)	(67,502)
Issuance of common stock	2,590	2,407
Repurchase of common stock	(16,126)	(25,976)
Other financing, net	2,220	(271)
Net cash used in financing activities	(18,816)	(21,342)
Effect of foreign exchange rate changes on cash and cash equivalents	(3,393)	(2,175)
Decrease in cash and cash equivalents	(32,749)	(30,286)
Cash and cash equivalents at beginning of period	136,411	133,086
Cash and cash equivalents at end of period	103,662	102,800
Non-cash transactions:
Property, plant, and equipment purchased but not yet paid	7,284	4,364
Supplemental disclosure of cash flow information:
Income taxes, net	8,200	20,173
Interest, net of amounts capitalized	$ 3,804	$ 4,275