Acquisitions and Purchase Accounting - Market Forge Acquisition (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Feb. 10, 2015	Jan. 30, 2015	Jan. 07, 2015	Oct. 15, 2013	Jan. 03, 2015	Dec. 28, 2013	Jan. 01, 2011	Jan. 07, 2014
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 5,500	$ 26,400	$ 14,500
Goodwill					808,491	687,955	526,011
Contingent consideration					9,200	8,628
Market Forge [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				7,000
Current assets								1,951
Property, plant and equipment								120
Goodwill								5,906
Other intangibles								4,191
Current liabilities								(4,928)
Consideration paid at closing								7,240
Deferred payments								3,000
Contingent consideration								1,500
Net assets acquired and liabilities assumed								11,740
as initially reported [Member] | Market Forge [Member]
Business Acquisition [Line Items]
Current assets								2,051
Property, plant and equipment								120
Goodwill								5,252
Other intangibles								4,191
Current liabilities								(4,374)
Consideration paid at closing								7,240
Deferred payments								3,000
Contingent consideration								1,374
Net assets acquired and liabilities assumed								11,614
Scenario, Adjustment [Member] | Market Forge [Member]
Business Acquisition [Line Items]
Current assets								(100)
Property, plant and equipment								0
Goodwill								654
Other intangibles								0
Current liabilities								(554)
Consideration paid at closing								0
Deferred payments								0
Contingent consideration								126
Net assets acquired and liabilities assumed								$ 126