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ALLOWANCE FOR LOAN LOSSES: Impaired Loans, Average Recorded Investment and Interest Recognized (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	$ 6,295	$ 9,016	$ 13,118
Interest Recognized on Impaired Loans	204	294	502
Commercial and construction | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	334	930	255
Interest Recognized on Impaired Loans	0	41	10
Commercial and construction | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	2,607	4,185	8,823
Interest Recognized on Impaired Loans	64	101	337
Commercial and construction | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	742	781	801
Interest Recognized on Impaired Loans	7	0	0
Commercial and construction | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,620	1,668	1,710
Interest Recognized on Impaired Loans	88	90	93
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	992	1,452	1,529
Interest Recognized on Impaired Loans	$ 45	$ 62	$ 62

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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