Acquisitions, Divestitures, Intangible Assets and Goodwill (Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite lived intangible assets
Gross Carrying Amount	$ 627,829		$ 627,829		$ 622,364
Accumulated Amortization	(455,044)		(455,044)		(434,986)
Net Carrying Amount	172,785		172,785		187,378
Finite Lived Intangible Assets Amortization Expense	11,000	$ 8,000	21,000	$ 16,000
Customer relationships
Finite lived intangible assets
Gross Carrying Amount	442,466		442,466		437,459
Accumulated Amortization	(289,881)		(289,881)		(272,353)
Net Carrying Amount	152,585		152,585		165,106
Software & technology
Finite lived intangible assets
Gross Carrying Amount	149,636		149,636		149,591
Accumulated Amortization	(136,860)		(136,860)		(135,198)
Net Carrying Amount	12,776		12,776		14,393
Trademarks & other
Finite lived intangible assets
Gross Carrying Amount	35,727		35,727		35,314
Accumulated Amortization	(28,303)		(28,303)		(27,435)
Net Carrying Amount	$ 7,424		$ 7,424		$ 7,879