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ALLOWANCE FOR LOAN LOSSES: Schedule of reconciliation of the allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 10,617	$ 10,063	$ 10,528	$ 9,885
Provision for (recapture of) loan losses	0	0	0	0
Charge-offs	(46)	(132)	(257)	(247)
Recoveries	296	358	596	651
Ending balance	10,867	10,289	10,867	10,289
Commercial Business
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,340	909	1,418	1,048
Provision for (recapture of) loan losses	(186)	131	(270)	(19)
Charge-offs	0	(1)	0	(1)
Recoveries	220	205	226	216
Ending balance	1,374	1,244	1,374	1,244
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,116	4,689	5,084	4,273
Provision for (recapture of) loan losses	(26)	162	40	576
Charge-offs	0	0	0	0
Recoveries	65	0	31	2
Ending balance	5,155	4,851	5,155	4,851
Land
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	196	154	228	325
Provision for (recapture of) loan losses	(19)	(113)	(344)	(472)
Charge-offs	0	0	0	0
Recoveries	0	132	293	320
Ending balance	177	173	177	173
Multi-Family
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	504	613	297	712
Provision for (recapture of) loan losses	295	(284)	502	(383)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	799	329	799	329
Real Estate Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	840	727	714	416
Provision for (recapture of) loan losses	(206)	94	(80)	405
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	634	821	634	821
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,890	2,290	2,099	2,403
Provision for (recapture of) loan losses	81	(13)	48	(103)
Charge-offs	(46)	(131)	(257)	(246)
Recoveries	11	21	46	113
Ending balance	1,936	2,167	1,936	2,167
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	731	681	688	708
Provision for (recapture of) loan losses	61	23	104	(4)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	$ 792	$ 704	$ 792	$ 704

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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-Publisher FASB
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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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Amount of expense related to estimated loss from loan and lease transactions.

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