Note 6 - Investment in Unconsolidated Affiliate (Details) (USD $)	3 Months Ended															12 Months Ended					3 Months Ended		12 Months Ended	1 Months Ended		3 Months Ended			12 Months Ended	3 Months Ended				12 Months Ended
	Dec. 28, 2013		Sep. 28, 2013		Jun. 29, 2013		Mar. 30, 2013		Dec. 29, 2012		Sep. 29, 2012		Jun. 30, 2012	Mar. 31, 2012		Dec. 31, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2012	Dec. 31, 2011	Mar. 30, 2013 Loans Receivable [Member] Shocking [Member]	Mar. 30, 2013 Shocking [Member] Equity Method Investments [Member]	Dec. 29, 2012 Shocking [Member] Equity Method Investments [Member]	Nov. 30, 2012 Shocking [Member]	Apr. 30, 2012 Shocking [Member]	Dec. 28, 2013 Shocking [Member]	Mar. 30, 2013 Shocking [Member]	Dec. 29, 2012 Shocking [Member]	Dec. 31, 2011 Shocking [Member]	Dec. 29, 2012 Equity Method Investments [Member]	Sep. 29, 2012 Equity Method Investments [Member]	Jun. 30, 2012 Equity Method Investments [Member]	Mar. 31, 2012 Equity Method Investments [Member]	Dec. 29, 2012 Equity Method Investments [Member]
Note 6 - Investment in Unconsolidated Affiliate (Details) [Line Items]
Investments in and Advances to Affiliates, at Fair Value, Gross Additions																									$ 10,000,000				$ 6,000,000
Investments in and Advances to Affiliates, at Fair Value									8,666,000									8,666,000							16,000,000				6,000,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	7.20%								7.20%								7.20%	7.20%							18.40%				6.10%
Increase (Decrease) in Notes Receivables																								2,000,000
Operating Income (Loss)	32,823,000	[1]	37,559,000	[2]	31,382,000	[3]	28,117,000	[3],[4]	18,019,000	[4],[5]	30,931,000	[5],[6]	32,096,000	25,824,000	[6],[7]	129,881,000	129,881,000	106,870,000	106,870,000	113,904,000			(4,000,000)							(3,811,000)	(1,965,000)	(1,033,000)	(525,000)	(7,334,000)
Other than Temporary Impairment Losses, Investments																					2,000,000	8,700,000					10,700,000	3,300,000		3,323,000				3,323,000
Investments									8,666,000									8,666,000									0
Income Taxes Paid, Net																										6,100,000
Income Tax Expense (Benefit)																	$ 35,451,000	$ 24,720,000		$ 28,077,000						$ 2,800,000	$ 3,300,000

[1] In the fourth quarter of 2013, the company recorded a $2.8 million charge to income tax expense related to the company's impairment of its investment in Shocking Technologies in the fourth quarter of 2012. (See Note 6). The company also recorded a $0.5 million non-cash credit related to the step-up of inventory from the Hamlin acquisition (See Note 2) and $0.2 million in acquisition expenses for the Hamlin acquisition.

[2] In the third quarter of 2013, the company recorded a $0.3 million non-cash charge related to the step-up of inventory from the Hamlin acquisition (See Note 2). The company also recorded $0.3 million in acquisition charges related to the Hamlin acquisition.

[3] In the second quarter of 2013, the company recorded a $1.7 million non-cash charge related to step-up of inventory from the Hamlin acquisition (See Note 2). The company also recorded $1.2 million in acquisition charges related to the Hamlin acquisition.

[4] In the first quarter of 2013, the company recorded a $10.7 million charge related to the impairment of Shocking Technologies. Additionally, the company restated net income for a $3.3 million charge to income tax expense related to the company's investment in Shocking Technologies (See Note 6).

[5] In the fourth quarter of 2012, the company recorded a $7.3 million charge related to the impairment and equity method losses of Shocking Technologies. (See Note 6). The company also recorded a $5.1 million charge related to a pension settlement (See Note 12).

[6] In the third quarter of 2012, the company recorded $0.5 million charge related to the impairment of the Dnsen, Germany property (See Note 11). The company also recorded $0.6 million in acquisition charges related to the Accel and Terra Power acquisitions and $0.4 million of non-cash charges related to the step-up of inventory from the Accel acquisition (See Note 2).

[7] In the first quarter of 2012, the company recorded a $0.2 million non-cash charge related to the step-up of inventory from the Selco acquisition (See Note 2).