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Note 10 - Acquisitions (Details Textual) - USD ($) $ in Thousands			9 Months Ended
	Sep. 28, 2015	Jul. 27, 2015	Sep. 30, 2015	Sep. 30, 2014
Peterbilt Dealership in Charlotte, North Carolina [Member]
Disposal Group, Including Discontinued Operation, Assets	$ 6,400
Disposal Group, Including Discontinued Operation, Liabilities	5,900
Peterbilt of Las Vegas, Inc. [Member]
Payments to Acquire Businesses, Gross	$ 3,400
Dallas Truck Center, Inc. [Member]
Payments to Acquire Businesses, Gross		$ 3,300
Payments to Acquire Businesses, Gross			$ 65,116	$ 147,758

X

- Definition

Amount classified as assets attributable to disposal group held for sale or disposed of.

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