Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended	6 Months Ended
	Jul. 02, 2011	Jul. 02, 2011
Changes in the carrying value of goodwill
Goodwill Gross Amount, Beginning balance		$ 162,128,000
Accumulated impairment losses, Beginning balance		(18,700,000)
Goodwill, Beginning Balance		143,428,000
Effect of foreign currency exchange rate changes		809,000
Goodwill acquired	15,900,000	15,915,000
Goodwill Gross Amount, Ending balance	178,852,000	178,852,000
Accumulated impairment losses, Ending balance	(18,700,000)	(18,700,000)
Goodwill, Ending Balance	160,152,000	160,152,000
Friction Control Products [Member]
Changes in the carrying value of goodwill
Goodwill Gross Amount, Beginning balance		56,396,000
Accumulated impairment losses, Beginning balance		0
Goodwill, Beginning Balance		56,396,000
Effect of foreign currency exchange rate changes		582,000
Goodwill acquired		0
Goodwill Gross Amount, Ending balance	56,978,000	56,978,000
Accumulated impairment losses, Ending balance	0	0
Goodwill, Ending Balance	56,978,000	56,978,000
Velocity Control Products [Member]
Changes in the carrying value of goodwill
Goodwill Gross Amount, Beginning balance		43,200,000
Accumulated impairment losses, Beginning balance		0
Goodwill, Beginning Balance		43,200,000
Effect of foreign currency exchange rate changes		227,000
Goodwill acquired		15,915,000
Goodwill Gross Amount, Ending balance	59,342,000	59,342,000
Accumulated impairment losses, Ending balance	0	0
Goodwill, Ending Balance	59,342,000	59,342,000
Other Industrial Products [Member]
Changes in the carrying value of goodwill
Goodwill Gross Amount, Beginning balance		62,532,000
Accumulated impairment losses, Beginning balance		(18,700,000)
Goodwill, Beginning Balance		43,832,000
Effect of foreign currency exchange rate changes		0
Goodwill acquired		0
Goodwill Gross Amount, Ending balance	62,532,000	62,532,000
Accumulated impairment losses, Ending balance	(18,700,000)	(18,700,000)
Goodwill, Ending Balance	$ 43,832,000	$ 43,832,000