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Fair Value Measurements: Fair Value Measurements, Nonrecurring, Valuation Techniques (Details)		6 Months Ended	12 Months Ended
		Sep. 30, 2016	Mar. 31, 2016
Impairment loans
Fair Value Measurements, Valuation Techniques		Appraised value	Appraised value
Significant unobservable inputs		Adjustment for market conditions	Adjustment for market conditions
Market adjustment to appraisals	[1]	0.00%	0.00%
Real estate owned
Fair Value Measurements, Valuation Techniques		Appraised value	Appraised value
Significant unobservable inputs		Adjustment for market conditions	Adjustment for market conditions
Market adjustment to appraisals	[1]	0.00%	0.00%
[1] There were no adjustments to these categories as of the periods noted.

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Minimum or maximum values of the market adjustment to appraisals.

+ References

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- Definition

Description of significant assumptions used by management to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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