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Mortgage-backed Securities: Schedule of mortgage-backed securities held to maturity (Details) (USD $)
In Thousands, unless otherwise specified

Sep. 30, 2012

Mar. 31, 2012

Investment securities held to maturity, at amortized cost

$ 493

Fair Value of Investment securities held to maturity

542

FHLMC mortgage-backed securities

Investment securities held to maturity, at amortized cost

66

^[1]

69

Held-to-maturity Securities, Unrecognized Holding Gain

4

^[1]

4

Fair Value of Investment securities held to maturity

70

^[1]

73

FNMA mortgage-backed securities

Investment securities held to maturity, at amortized cost

98

^[2]

102

Held-to-maturity Securities, Unrecognized Holding Gain

2

^[2]

2

Fair Value of Investment securities held to maturity

100

^[2]

104

Mortgage-backed

Investment securities held to maturity, at amortized cost

164

171

Held-to-maturity Securities, Unrecognized Holding Gain

6

6

Fair Value of Investment securities held to maturity

$ 170

$ 177

[1]	Federal Home Loan Mortgage Corporation (FHLMC)
[2]	Federal National Mortgage Association (FNMA)

X

- Definition

Amount of investments in debt securities categorized as held-to-maturity valued at amortized cost, excludes other than temporary impairment (OTTI).

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 19

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 137

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

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Data Type:	xbrli:monetaryItemType
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X

- Definition

As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 19

-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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 137

-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.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

+ Details

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Namespace Prefix:	us-gaap_
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