Intangible Assets and Goodwill (Intangible Assets Disclosure) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite lived intangible assets
Gross Carrying Amount	$ 622,364	$ 560,342
Accumulated Amortization	(434,986)	(478,169)
Net Carrying Amount	187,378	82,173
Amortization expense for intangible assets	37,000	34,000	$ 37,000
Customer relationships
Finite lived intangible assets
Gross Carrying Amount	437,459	337,438
Accumulated Amortization	(272,353)	(263,121)
Net Carrying Amount	165,106	74,317
Supplier relationships
Finite lived intangible assets
Gross Carrying Amount	0	29,000
Accumulated Amortization	0	(27,913)
Net Carrying Amount	0	1,087
Software & technology
Finite lived intangible assets
Gross Carrying Amount	149,591	160,825
Accumulated Amortization	(135,198)	(154,610)
Net Carrying Amount	14,393	6,215
Trademarks & other
Finite lived intangible assets
Gross Carrying Amount	35,314	33,079
Accumulated Amortization	(27,435)	(32,525)
Net Carrying Amount	$ 7,879	$ 554