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LOANS RECEIVABLE: Loans receivable, excluding loans held for sale (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 876,116	$ 811,376
Less: Allowance for loan losses		11,457	10,766	$ 10,528	$ 9,885
Loans receivable, net		864,659	800,610
Commercial and construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		783,707	706,270
Commercial and construction | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		162,796	137,672
Less: Allowance for loan losses		1,808	1,668	1,418	1,048
Commercial and construction | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		461,432	450,597
Less: Allowance for loan losses		5,053	4,914	5,084	4,273
Commercial and construction | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		17,027	15,337
Less: Allowance for loan losses		254	220	228	325
Commercial and construction | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		51,570	63,080
Less: Allowance for loan losses		728	822	297	712
Commercial and construction | Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		90,882	39,584
Less: Allowance for loan losses		1,457	618	714	416
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		92,409	105,106
Less: Allowance for loan losses		1,447	1,809	$ 2,099	$ 2,403
Consumer | Real estate one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		84,053	90,109
Consumer | Other installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 8,356	$ 14,997
[1] Consists primarily of purchased automobile loans totaling $5.8 million and $12.9 million at March 31, 2019 and 2018, respectively.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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-Publisher FASB
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-SubTopic 210
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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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