Acquisitions and Dispositions (Details) - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2015	Jun. 18, 2015	Jun. 01, 2015	Mar. 30, 2015	Feb. 28, 2014	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Jun. 30, 2015	Mar. 31, 2015	Dec. 27, 2014	Dec. 29, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of property								$ 5,521	$ 4,920
Pre-tax gain on sale of property						$ 0	$ 0	$ 15,376	1,417
DWV Ontario Manufacturing Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease-back term								22 months
Total sales price of property			$ 20,200
Cash proceeds from sale of property			5,000
Deferred revenue - current						5,000		$ 5,000
Deferred revenue - noncurrent						$ 10,200		10,200
Pre-tax gain on sale of property			$ 15,400
Amount of pre diluted share after tax (in dollars per share)			$ 0.17
Carrying value of disposal assets			$ 2,300
Disposal group - goodwill			$ 2,400
KME Yorkshire Limited [Member]
Business Acquisition [Line Items]
Cost of acquisition					$ 30,100
Pro forma net sales													$ 196,100
Fair value of assets acquired					20,700
Fair value of assets acquired - property, plant and equipment					2,100
Fair value of assets acquired - inventories					17,600
Fair value of assets acquired - other current assets					1,000
Fair value of liabilities assumed					15,600
Fair value of liabilities assumed - accounts payable and accrued expenses					15,200
Fair value of liabilities assumed - other current liabilities					400
Remaining purchase price allocated to tax-deductible goodwill					8,100
Remaining purchase price allocated to other intangible assets					$ 16,900
Severance costs related to reorganization								$ 3,400	$ 3,100
Turbotec Products, Inc. [Member]
Business Acquisition [Line Items]
Cost of acquisition				$ 14,200
Pro forma net sales											$ 21,800
Fair value of assets acquired				14,400
Fair value of assets acquired - property, plant and equipment				9,100
Fair value of assets acquired - inventories				3,200
Fair value of assets acquired - accounts receivable				1,900
Fair value of assets acquired - other current assets				100
Fair value of assets acquired - other assets				100
Fair value of liabilities assumed				2,000
Fair value of liabilities assumed - accounts payable				1,600
Fair value of liabilities assumed - accrued expenses				400
Remaining purchase price allocated non-tax-deductible goodwill				2,100
Remaining purchase price allocated to other intangible assets				900
Remaining purchase price allocated to deferred tax liabilities				$ 1,200
Sherwood Valve Products, LLC [Member]
Business Acquisition [Line Items]
Cost of acquisition		$ 21,800
Pro forma net sales												$ 49,100
Fair value of assets acquired		28,900
Fair value of assets acquired - property, plant and equipment		10,300
Fair value of assets acquired - inventories		11,900
Fair value of assets acquired - accounts receivable		6,500
Fair value of assets acquired - other current assets		200
Fair value of liabilities assumed		7,100
Fair value of liabilities assumed - accounts payable		6,000
Fair value of liabilities assumed - accrued expenses		500
Fair value of liabilities assumed - other current liabilities		500
Fair value of liabilities assumed - other non current liabilities		$ 100
Great Lakes Copper, Inc [Member]
Business Acquisition [Line Items]
Cost of acquisition	$ 71,500
Pro forma net sales										$ 260,500
Fair value of assets acquired	49,900
Fair value of assets acquired - property, plant and equipment	9,500
Fair value of assets acquired - inventories	14,300
Fair value of assets acquired - accounts receivable	26,000
Fair value of assets acquired - other current assets	100
Fair value of liabilities assumed	40,300
Fair value of liabilities assumed - accounts payable	34,400
Fair value of liabilities assumed - other current liabilities	200
Fair value of liabilities assumed - other post retirement benefits	5,700
Remaining purchase price allocated tax and non-tax-deductible goodwill	$ 61,900