Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Computer Hardware And Software [Member] years	Dec. 31, 2011 Card-Reading Equipment [Member] years	Dec. 31, 2011 Furniture, Fixtures, And Vehicles [Member] years	Dec. 31, 2011 Building And Improvements [Member] years
Property, Plant and Equipment [Line Items]
Computer hardware and software	$ 72,920	$ 65,419
Card-reading Equipment	6,960	6,695
Furniture, fixtures, and vehicles	5,236	5,619
Buildings and improvements	8,264	5,280
Property, plant and equipment, gross	93,380	83,013
Less: accumulated depreciation	(60,656)	(56,195)
Property, plant and equipment, net	$ (32,724)	$ (26,818)
Estimated Useful Lives (in Years), Minimum			3		3	10
Estimated Useful Lives (in Years), Maximum			7		6	30
Estimated Useful Lives (in Years)				5