Note 2 - Acquisition of Businesses (Details) - Unaudited Pro Forma Results (Hamlin, Inc. [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Hamlin, Inc. [Member]
Note 2 - Acquisition of Businesses (Details) - Unaudited Pro Forma Results [Line Items]
Revenues	$ 220,908	$ 201,346	$ 427,767	$ 390,055
Net income	$ 24,578	$ 26,224	$ 49,967	$ 38,435
Net income per share:
Basic	$ 1.09	$ 1.17	$ 2.22	$ 1.89
Diluted	$ 1.08	$ 1.16	$ 2.20	$ 1.87
Weighted-average shares and equivalent shares outstanding:
Basic	22,579	22,296	22,536	22,197
Diluted	22,750	22,499	22,738	22,431

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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