Description Of Business And Basis Of Presentation Fiscal Period (Details)	3 Months Ended
	Jun. 30, 2012
Fiscal Period
Current and prior years fiscal period (in weeks)	P52W
Current and prior years fiscal quarter period (in weeks)	P13W
Minimum
Fiscal Period
Fiscal year (in weeks)	P52W
Maximum
Fiscal Period
Fiscal year (in weeks)	P53W