Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 436,058	$ 567,843
Goodwill and intangibles acquired	458,596
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Current assets, net of cash acquired	96,436
Property, Plant, and Equipment	24,319
Goodwill	281,903
Intangibles	176,693
Other Non-current Assets	5,429
Current Liabilities	102,317
Non-current Liabilities	46,405
Revenue from continuing operations [Abstract]
As reported	1,622,273	1,715,501
Pro forma	1,628,406	1,836,711
Net earnings from continuing operations [Abstract]
As reported	99,356	117,190
Pro forma	$ 107,613	$ 122,404
Basic earnings per share from continuing operations [Abstract]
As reported (in dollars per share)	$ 0.64	$ 0.72
Pro forma (in dollars per share)	0.69	0.76
Diluted earnings per share from continuing operations [Abstract]
As reported (in dollars per share)	0.64	0.72
Pro forma (in dollars per share)	$ 0.69	$ 0.75
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount	$ 93,227
Acquired finite-lived intangible assets, weighted average useful life	10 years
Trademarks [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount	$ 23,691
Acquired finite-lived intangible assets, weighted average useful life	10 years
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount	$ 59,775
Acquired finite-lived intangible assets, weighted average useful life	11 years