Acquisitions (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($) $ / shares	Sep. 30, 2015 USD ($) $ / shares	Sep. 30, 2016 USD ($) $ / shares	Sep. 30, 2015 USD ($) $ / shares	Dec. 31, 2015
Business Acquisition [Line Items]
Number of Businesses Acquired			4		4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 501,828	$ 567,843	$ 501,828	$ 567,843
Goodwill and intangibles acquired	523,471		523,471
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Current assets, net of cash acquired	109,032		109,032
Property, Plant, and Equipment	31,310		31,310
Goodwill	314,633		314,633
Intangibles assets	208,838		208,838
Other Non-current Assets	5,564		5,564
Current Liabilities	(109,471)		(109,471)
Non-current Liabilities	(58,078)		(58,078)
Revenue from continuing operations [Abstract]
As reported	1,707,763	1,787,582	5,016,381	5,261,711
Pro forma	1,712,752	1,920,936	5,045,548	5,657,933
Net earnings from continuing operations [Abstract]
As reported	130,084	186,483	347,730	459,307
Pro forma	$ 131,440	$ 196,229	$ 357,507	$ 482,014
Basic earnings per share from continuing operations [Abstract]
As reported (in dollars per share) | $ / shares	$ 0.84	$ 1.20	$ 2.24	$ 2.90
Pro forma (in dollars per share) | $ / shares	0.85	1.26	2.30	3.04
Diluted earnings per share from continuing operations [Abstract]
As reported (in dollars per share) | $ / shares	0.83	1.19	2.22	2.87
Net earnings (in dollars per diluted share) | $ / shares	0.83	1.19	2.22	4.55
Pro forma (in dollars per share) | $ / shares	$ 0.84	$ 1.25	$ 2.28	$ 3.01
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount			$ 116,116
Acquired finite-lived intangible assets, weighted average useful life			10 years
Trademarks [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount			$ 26,332
Acquired finite-lived intangible assets, weighted average useful life			15 years
Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount			$ 825
Acquired finite-lived intangible assets, weighted average useful life			8 years
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount			$ 65,565
Acquired finite-lived intangible assets, weighted average useful life			10 years