Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Operating activities
Net earnings	$ 28,152	$ 30,925
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	40,017	45,410
(Gain) loss on disposal of property and equipment	(22)	(83)
Accretion of interest on convertible debentures	1,120	1,036
Inventory write-offs for obsolescence	5,816	4,854
Gain on early extinguishment of debt	(3,611)	0
Other	(13,950)	(7,080)
Net change in operating assets and liabilities, net of effects of businesses acquired	(37,264)	(61,564)
Net cash provided by operating activities	20,258	13,498
Investing activities
Capital expenditures	(19,756)	(19,782)
Proceeds from sale of property and equipment	64	719
Purchase of short-term investments	(24,588)	(78,905)
Maturity of short-term investments	117,676	17,414
Sale of short-term investments	0	503
Sale of other investments	0	400
Other investing activities	2,975	977
Net cash provided by (used in) investing activities	76,371	(78,674)
Financing activities
Principal payments on long-term debt and capital leases	(22,595)	0
Net proceeds (payments) on revolving credit lines	(12,000)	15,000
Net changes in short-term borrowings	(719)	(6)
Excess tax benefit from RSUs vested	0	21
Net cash provided by (used in) financing activities	(44,545)	6,161
Effect of exchange rate changes on cash and cash equivalents	3,705	(16,155)
Net increase (decrease) in cash and cash equivalents	55,789	(75,170)
Cash and cash equivalents at beginning of period	475,507	592,172
Cash and cash equivalents at end of period	531,296	517,002
Common Stock [Member]
Financing activities
Dividends and Interest Paid	(8,473)	(8,126)
Class B Convertible Common Stock [Member]
Financing activities
Dividends and Interest Paid	$ (758)	$ (728)