Commitments and Contingencies (Details Textual) (USD $)	12 Months Ended
	Mar. 31, 2013 Fund	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2012 acre
Loss Contingencies [Line Items]
Agreement to sell acres of underdeveloped land				180
Asset sale contract, expected proceeds from sale				$ 37,000,000
Commitments and Contingencies (Textual) [Abstract]
General unsecured claims eligible to receive common stock	2,500,000.0
Purchase of warrants	6,700,000.0
Common stock, price per share	$ 29.84
Percentage of common stock and warrants, reserved for disputed claims	13.40%
Common stock claim amount distributed, per share	$ 383.00
Number of federally defined superfund sites	50
Intended to disclose environmental remediation cost liability	25,400,000	27,700,000
Onsite and offsite environmental remediation costs	25,400,000	27,700,000
Maximum repayment period of letters of credit	1 year
Bank guarantees outstanding	11,200,000
Rent expense	50,600,000	50,500,000	49,500,000
Minimum
Loss Contingencies [Line Items]
Remediaiton and site closure estimate	13,200,000
Cost estimates for remediation	5,700,000
Asset sale contract, expected net favorable impact on pre-tax income				25.0
Maximum
Loss Contingencies [Line Items]
Remediaiton and site closure estimate	20,000,000
Cost estimates for remediation	8,500,000
Asset sale contract, expected net favorable impact on pre-tax income				$ 27,000,000