Intangible Assets and Goodwill (Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite lived intangible assets
Gross Carrying Amount	$ 619,396		$ 619,396		$ 560,342
Accumulated Amortization	(427,078)		(427,078)		(478,169)
Net Carrying Amount	192,318		192,318		82,173
Finite Lived Intangible Assets Amortization Expense	11,000	$ 9,000	27,000	$ 26,000
Customer relationships
Finite lived intangible assets
Gross Carrying Amount	433,475		433,475		337,438
Accumulated Amortization	(265,371)		(265,371)		(263,121)
Net Carrying Amount	168,104		168,104		74,317
Supplier relationships
Finite lived intangible assets
Gross Carrying Amount	0		0		29,000
Accumulated Amortization	0		0		(27,913)
Net Carrying Amount	0		0		1,087
Software & technology
Finite lived intangible assets
Gross Carrying Amount	150,373		150,373		160,825
Accumulated Amortization	(134,530)		(134,530)		(154,610)
Net Carrying Amount	15,843		15,843		6,215
Trademarks & other
Finite lived intangible assets
Gross Carrying Amount	35,548		35,548		33,079
Accumulated Amortization	(27,177)		(27,177)		(32,525)
Net Carrying Amount	$ 8,371		$ 8,371		$ 554