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ALLOWANCE FOR LOAN LOSSES: Schedule of Impaired Loans, Average Recorded Investment and Interest Recognized (Details 5) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	$ 8,758	$ 13,727	$ 9,794	$ 13,886
Interest Recognized on Impaired Loans	72	143	161	281
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,116	245	842	228
Interest Recognized on Impaired Loans	4	6	23	9
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	3,723	9,463	5,017	9,576
Interest Recognized on Impaired Loans	31	97	61	194
Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	786	801	791	801
Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,675	1,715	1,680	1,720
Interest Recognized on Impaired Loans	22	24	46	47
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,458	1,503	1,464	1,561
Interest Recognized on Impaired Loans	$ 15	$ 16	$ 31	$ 31

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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://www.xbrl.org/2003/role/presentationRef
-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

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