Accrued Expenses And Other Current Liabilities (Details) (USD $)	Dec. 31, 2012		Mar. 31, 2012
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued payroll and employee benefits	$ 91,378,000		$ 99,474,000
Business insurance reserves	54,066,000	[1]	51,435,000	[1]
Taxes other than income taxes	24,593,000		20,273,000
Cash overdraft	60,836,000		72,445,000
Deferred rental revenue	31,810,000		29,720,000
Other accrued expenses and current liabilities	85,041,000		82,997,000
Accrued expenses and other current liabilities	347,724,000		356,344,000
Insurance receivables	$ 13,900,000		$ 13,800,000

[1] With respect to the business insurance reserves above, the Company had corresponding insurance receivables of $13.9 million at December 31, 2012 and $13.8 million at March 31, 2012, which are included within the “Prepaid expenses and other current assets” line item on the Company’s Consolidated Balance Sheets. The insurance receivables represent the balance of probable claim losses in excess of the Company’s deductible for which the Company is fully insured.