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ALLOWANCE FOR LOAN LOSSES: Schedule of Impaired Loans, Average Recorded Investment and Interest Recognized (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	$ 13,118	$ 18,262	$ 24,391
Interest Recognized on Impaired Loans	502	644	642
Commercial and construction | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	255	542	1,075
Interest Recognized on Impaired Loans	10	17	62
Commercial and construction | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	8,823	13,130	17,136
Interest Recognized on Impaired Loans	337	456	478
Commercial and construction | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	801	801	817
Interest Recognized on Impaired Loans
Commercial and construction | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,710	1,842	2,176
Interest Recognized on Impaired Loans	93	99	17
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average Recorded Investment	1,529	1,947	3,187
Interest Recognized on Impaired Loans	$ 62	$ 72	$ 85

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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=66008989&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=66008989&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=66008989&loc=d3e5212-111524

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