Acquisitions (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended		9 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 03, 2013	Sep. 27, 2014 Benshaw member [Domain]	Jun. 30, 2014 Benshaw member [Domain]	Sep. 27, 2014 Hy-Bon [Domain]	Feb. 07, 2014 Hy-Bon [Domain]	Sep. 28, 2013 RAM Motor Business [Member]	Sep. 28, 2013 South African distribution business [Domain]	Sep. 28, 2013 Cemp [Member]	Nov. 19, 2013 Cemp [Member]
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Business			$ 1,900,000	$ 0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage					60.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage					80.00%
Noncontrolling Interest in Variable Interest Entity					0.200
Business Acquisition, Cost of Acquired Entity, Cash Paid						51,000,000		78,000,000		6,000,000	1,700,000	34,600,000
Acquisition-related expenses	200,000		1,300,000	3,200,000
revenue from acquisitions	42,600,000	5,600,000	97,800,000	17,900,000
income from acquisitions	1,800,000	1,100,000	7,100,000	3,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets							$ 9,900,000		$ 40,600,000				$ 14,800,000