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ALLOWANCE FOR LOAN LOSSES: Schedule of TDRs by Interest Accrual Status (Details 6) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	$ 6,348	$ 9,429
Nonaccrual	2,374	2,437
Total	8,722	11,866
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	827
Nonaccrual	290	294
Total	1,117	294
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	2,400	6,262
Nonaccrual	1,304	1,342
Total	3,704	7,604
Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	780	801
Total	780	801
Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	1,669	1,692
Total	1,669	1,692
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	1,452	1,475
Total	$ 1,452	$ 1,475

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