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Employee Benefit and Stock Compensation Plans Stock Options (Details) (USD $)	4 Months Ended		12 Months Ended
	Mar. 31, 2012		Mar. 31, 2013		Mar. 31, 2011		Mar. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	7,362	[1]	5,362	[1]	10,244	[1]	12,715	[1]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price	$ 235.00		$ 255.17		$ 216.75		$ 204.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	[1]	0	[1]	200	[1]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0.00		$ 0.00		$ 97.50
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	0	[1]	0	[1]	0	[1]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.00		$ 0		$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(2,882)	[1]	(2,000)	[1]	(2,671)	[1]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 170.08		$ 180.9		$ 147.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	6,696	[1]	5,229	[1]	9,578	[1]
[1] Options for all periods presented reflects a 1-for-15 reverse stock split which was effective on October 27, 2011

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c), d(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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X

- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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-Publisher FASB

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-SubTopic 10

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X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Number of share options (or share units) exercised during the current period.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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