Accrued Expenses And Other Current Liabilities (Details) (USD $)	Sep. 30, 2014		Mar. 31, 2014
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued payroll and employee benefits	$ 87,281,000		$ 92,038,000
Business insurance reserves	50,480,000	[1]	49,372,000	[1]
Income taxes	12,799,000		8,943,000
Taxes other than income taxes	27,622,000		25,183,000
Cash overdraft	64,650,000		68,245,000
Deferred rental revenue	33,142,000		34,557,000
Accrued interest	14,567,000		11,335,000
Other accrued expenses and current liabilities	57,868,000		56,003,000
Accrued expenses and other current liabilities	348,409,000		345,676,000
Insurance receivables	$ 11,600,000		$ 11,800,000

[1] With respect to the business insurance reserves above, the Company had corresponding insurance receivables of $11.6 million at September 30, 2014 and $11.8 million at March 31, 2014, 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.