Fair Value Measurements Fair Value on a Recurring basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset at Amortized Cost	$ 419	$ 491
US Treasuries, AFS, Fair Value Disclosure	2,802	3,361
Government National Mortgage Asscociation, AFS, Fair Value Disclosure	23,005	27,612
Federal Home Loan Mortgage Corp., AFS, Fair Value Disclosure	6,920	5,305
Federal National Mortgage Corporation, AFS, Fair Value Disclosure	4,805	6,141
Asset-Backed Securities, at Carrying Value	15,349
Corporate Securities, AFS, Fair Value Disclosure	2,022	1,949
Other Securities, AFS, Fair Value Disclosure	55,033	40,738
AFS Fair Value	109,936	85,106
Assets, Fair Value Disclosure	110,355	85,597
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset at Amortized Cost	0	0
US Treasuries, AFS, Fair Value Disclosure	2,802	3,361
Government National Mortgage Asscociation, AFS, Fair Value Disclosure	0	0
Federal Home Loan Mortgage Corp., AFS, Fair Value Disclosure	0	0
Federal National Mortgage Corporation, AFS, Fair Value Disclosure	0	0
Asset-Backed Securities, at Carrying Value	0
Corporate Securities, AFS, Fair Value Disclosure	0	0
Other Securities, AFS, Fair Value Disclosure	0	0
AFS Fair Value	2,802	3,361
Assets, Fair Value Disclosure	2,802	3,361
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset at Amortized Cost	0	0
US Treasuries, AFS, Fair Value Disclosure	0	0
Government National Mortgage Asscociation, AFS, Fair Value Disclosure	23,005	27,612
Federal Home Loan Mortgage Corp., AFS, Fair Value Disclosure	6,920	5,305
Federal National Mortgage Corporation, AFS, Fair Value Disclosure	4,805	6,141
Asset-Backed Securities, at Carrying Value	15,349
Corporate Securities, AFS, Fair Value Disclosure	2,022	1,949
Other Securities, AFS, Fair Value Disclosure	54,983	40,686
AFS Fair Value	107,084	81,693
Assets, Fair Value Disclosure	107,084	81,693
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset at Amortized Cost	419	491
US Treasuries, AFS, Fair Value Disclosure	0	0
Government National Mortgage Asscociation, AFS, Fair Value Disclosure	0	0
Federal Home Loan Mortgage Corp., AFS, Fair Value Disclosure	0	0
Federal National Mortgage Corporation, AFS, Fair Value Disclosure	0	0
Asset-Backed Securities, at Carrying Value	0
Corporate Securities, AFS, Fair Value Disclosure	0	0
Other Securities, AFS, Fair Value Disclosure	50	52
AFS Fair Value	50	52
Assets, Fair Value Disclosure	$ 469	$ 543

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

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-Name Statement of Financial Accounting Standard (FAS)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594

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- Definition

The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 940

-SubTopic 320

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6475986&loc=d3e42546-110969

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- Definition

Amortized carrying amount (balance) as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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-Name FASB Staff Position (FSP)

-Number FAS140-4/FIN46(R)-8

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