Allowance for Loan Losses: Schedule of reconciliation of the allowance for loan losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Loans and Leases Receivable, Allowance, Beginning Balance	$ 12,001	$ 13,696	$ 12,551	$ 15,643
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(400)		(1,050)	(2,500)
Allowance for Loan and Lease Losses, Charge-offs	(43)	(275)	(202)	(754)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	143	627	402	1,659
Loans and Leases Receivable, Allowance, Ending Balance	11,701	14,048	11,701	14,048
Commercial business
Loans and Leases Receivable, Allowance, Beginning Balance	1,579	1,913	2,409	2,128
Allowance for Loan and Lease Losses, Provision for Loss, Gross	117	(170)	(644)	(503)
Allowance for Loan and Lease Losses, Charge-offs	(16)	(36)	(89)	(135)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	24	306	28	523
Loans and Leases Receivable, Allowance, Ending Balance	1,704	2,013	1,704	2,013
Commercial Real Estate
Loans and Leases Receivable, Allowance, Beginning Balance	5,187	6,787	5,269	5,979
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(868)	(652)	(922)	313
Allowance for Loan and Lease Losses, Charge-offs		(102)	(28)	(274)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts		8		23
Loans and Leases Receivable, Allowance, Ending Balance	4,319	6,041	4,319	6,041
Land
Loans and Leases Receivable, Allowance, Beginning Balance	265	815	340	2,019
Allowance for Loan and Lease Losses, Provision for Loss, Gross	192	(782)	(1)	(2,461)
Allowance for Loan and Lease Losses, Charge-offs				(45)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	102	289	220	809
Loans and Leases Receivable, Allowance, Ending Balance	559	322	559	322
Multi-Family
Loans and Leases Receivable, Allowance, Beginning Balance	360	269	203	541
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(1)	(101)	156	(373)
Loans and Leases Receivable, Allowance, Ending Balance	359	168	359	168
Real estate construction
Loans and Leases Receivable, Allowance, Beginning Balance	319	235	387	221
Allowance for Loan and Lease Losses, Provision for Loss, Gross	461	5	393	22
Allowance for Loan and Lease Losses, Charge-offs				(7)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts				4
Loans and Leases Receivable, Allowance, Ending Balance	780	240	780	240
Total consumer
Loans and Leases Receivable, Allowance, Beginning Balance	2,822	1,845	2,653	2,949
Allowance for Loan and Lease Losses, Provision for Loss, Gross	60	215	150	(1,009)
Allowance for Loan and Lease Losses, Charge-offs	(27)	(137)	(85)	(293)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	17	24	154	300
Loans and Leases Receivable, Allowance, Ending Balance	2,872	1,947	2,872	1,947
Unallocated
Loans and Leases Receivable, Allowance, Beginning Balance	1,469	1,832	1,290	1,806
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(361)	1,485	(182)	1,511
Loans and Leases Receivable, Allowance, Ending Balance	$ 1,108	$ 3,317	$ 1,108	$ 3,317