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Segment Information - By Segment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2015 USD ($)	Sep. 26, 2014 USD ($)	Sep. 25, 2015 USD ($) segment	Sep. 26, 2014 USD ($)	Dec. 26, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Net Sales	$ 318,986	$ 302,614	$ 960,928	$ 915,125
Operating Earnings	76,927	78,907	226,049	239,460
Assets	1,387,399		1,387,399		$ 1,544,778
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Net Sales	152,164	150,481	448,932	459,105
Operating Earnings	50,822	49,167	144,500	149,164
Assets	557,592		557,592		548,868
Operating Segments | Process
Segment Reporting Information [Line Items]
Net Sales	64,710	52,719	204,337	160,579
Operating Earnings	10,437	12,161	34,923	38,376
Assets	483,788		483,788		304,903
Operating Segments | Contractor
Segment Reporting Information [Line Items]
Net Sales	102,112	99,414	307,659	295,441
Operating Earnings	24,135	23,358	70,550	69,897
Assets	210,707		210,707		176,757
Unallocated corporate (expense)
Segment Reporting Information [Line Items]
Operating Earnings	(8,467)	$ (5,779)	(23,924)	$ (17,977)
Assets	$ 135,312		$ 135,312		$ 514,250

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



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-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.18)



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