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ALLOWANCE FOR LOAN LOSSES: Schedule of TDRs by Interest Accrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	$ 9,598	$ 11,845
Nonaccrual	2,468	2,090
Total	12,066	13,935
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	107	192
Nonaccrual	189
Total	296	192
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	6,306	8,244
Nonaccrual	1,478	1,289
Total	7,784	9,533
Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual
Nonaccrual	801	801
Total	801	801
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	1,698	1,731
Nonaccrual
Total	1,698	1,731
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	1,487	1,678
Nonaccrual
Total	$ 1,487	$ 1,678

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