Intangible Assets and Goodwill (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Finite lived intangible assets
Goodwill Impairment Loss Rounded				$ 84,500,000
Amortization expense for intangible assets	45,000,000	58,000,000	61,000,000
Customer Relationships
Finite lived intangible assets
Gross Carrying Amount	407,901,000	409,489,000	407,901,000	409,489,000
Accumulated Amortization	(269,100,000)	(237,536,000)	(269,100,000)	(237,536,000)
Net Carrying Amount	138,801,000	171,953,000	138,801,000	171,953,000
Supplier Relationships
Finite lived intangible assets
Gross Carrying Amount	29,000,000	29,000,000	29,000,000	29,000,000
Accumulated Amortization	(22,113,000)	(19,213,000)	(22,113,000)	(19,213,000)
Net Carrying Amount	6,887,000	9,787,000	6,887,000	9,787,000
Software & Technology
Finite lived intangible assets
Gross Carrying Amount	169,632,000	170,286,000	169,632,000	170,286,000
Accumulated Amortization	(151,628,000)	(143,456,000)	(151,628,000)	(143,456,000)
Net Carrying Amount	18,004,000	26,830,000	18,004,000	26,830,000
Trademark & trade names
Finite lived intangible assets
Gross Carrying Amount	35,078,000	33,908,000	35,078,000	33,908,000
Accumulated Amortization	(32,615,000)	(30,076,000)	(32,615,000)	(30,076,000)
Net Carrying Amount	2,463,000	3,832,000	2,463,000	3,832,000
Non-compete agreements
Finite lived intangible assets
Gross Carrying Amount	7,471,000	7,564,000	7,471,000	7,564,000
Accumulated Amortization	(7,412,000)	(7,363,000)	(7,412,000)	(7,363,000)
Net Carrying Amount	59,000	201,000	59,000	201,000
Total intangible assets
Finite lived intangible assets
Gross Carrying Amount	649,082,000	650,247,000	649,082,000	650,247,000
Accumulated Amortization	(482,868,000)	(437,644,000)	(482,868,000)	(437,644,000)
Net Carrying Amount	$ 166,214,000	$ 212,603,000	$ 166,214,000	$ 212,603,000