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Carrying Value of Surplus Real Estate (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Mar. 31, 2012
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Real Estate Companies Disclosures [Abstract] |  |
Carrying value of surplus real estate | $ 14.3 | $ 14.8

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- Definition Amount of investment in certain other real estate investments not specifically identified elsewhere in the existing taxonomy. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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