Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Operating activities
Net earnings	$ 60,626	$ 79,905
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	83,456	83,838
(Gain) loss on disposal of property and equipment	86	(13,070)
Accretion of interest on convertible debentures	1,787	1,308
Inventory write-offs for obsolescence	9,479	10,050
Other	(3,929)	8,110
Net change in operating assets and liabilities, net of effects of businesses acquired	(57,437)	(75,737)
Net cash provided by operating activities	94,068	94,404
Investing activities
Capital expenditures	(47,173)	(47,298)
Proceeds from sale of property and equipment	3,252	6,355
Purchase of businesses, net of cash acquired	(23,034)	(85,493)
Purchase of short-term investments	(361,940)	(201,143)
Maturity of short-term investments	190,602	207,077
Other investing activities	934	(640)
Net cash used in investing activities	(237,359)	(121,142)
Financing activities
Proceeds from long-term borrowings	0	150,000
Issuance costs	0	(4,827)
Common stock repurchase	0	(150,000)
Principal payments on long-term debt and capital leases	(14)	(16)
Net proceeds (payments) on revolving credit lines	11,000	5,000
Net changes in short-term borrowings	698	(2)
Proceeds from stock options exercised	0	174
Excess tax benefit from RSUs vested	456	0
Net cash provided by financing activities	12,140	329
Effect of exchange rate changes on cash and cash equivalents	(5,245)	(13,907)
Net decrease in cash and cash equivalents	(136,396)	(40,316)
Cash and cash equivalents at beginning of period	697,595	749,088
Cash and cash equivalents at end of period	$ 561,199	$ 708,772