Allowance for Loan Losses: Schedule of reconciliation of the allowance for loan losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Loans and Leases Receivable, Allowance, Beginning Balance	$ 13,697	$ 20,972	$ 15,643	$ 19,921
Allowance for Loan and Lease Losses, Provision for Loss, Gross		500	(2,500)	4,500
Allowance for Loan and Lease Losses, Charge-offs	(197)	(1,414)	(479)	(4,461)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	196	82	1,032	180
Loans and Leases Receivable, Allowance, Ending Balance	13,696	20,140	13,696	20,140
Commercial business
Loans and Leases Receivable, Allowance, Beginning Balance	1,694	2,576	2,128	2,688
Allowance for Loan and Lease Losses, Provision for Loss, Gross	230	20	(333)	500
Allowance for Loan and Lease Losses, Charge-offs	(44)	(367)	(99)	(991)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	33	54	217	86
Loans and Leases Receivable, Allowance, Ending Balance	1,913	2,283	1,913	2,283
Commercial Real Estate
Loans and Leases Receivable, Allowance, Beginning Balance	5,568	7,622	5,979	5,599
Allowance for Loan and Lease Losses, Provision for Loss, Gross	1,317	(99)	965	2,859
Allowance for Loan and Lease Losses, Charge-offs	(98)	(147)	(172)	(1,082)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts			15
Loans and Leases Receivable, Allowance, Ending Balance	6,787	7,376	6,787	7,376
Land
Loans and Leases Receivable, Allowance, Beginning Balance	1,294	3,958	2,019	4,906
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(479)	(103)	(1,678)	(208)
Allowance for Loan and Lease Losses, Charge-offs	(37)	(180)	(45)	(1,054)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	37		519	31
Loans and Leases Receivable, Allowance, Ending Balance	815	3,675	815	3,675
Multi-Family
Loans and Leases Receivable, Allowance, Beginning Balance	332	945	541	1,121
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(63)	4	(272)	212
Allowance for Loan and Lease Losses, Charge-offs				(384)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts		1		1
Loans and Leases Receivable, Allowance, Ending Balance	269	950	269	950
Real estate construction
Loans and Leases Receivable, Allowance, Beginning Balance	239	480	221	412
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(4)	64	17	206
Allowance for Loan and Lease Losses, Charge-offs		(41)	(7)	(116)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts		3	4	4
Loans and Leases Receivable, Allowance, Ending Balance	235	506	235	506
Total consumer
Loans and Leases Receivable, Allowance, Beginning Balance	2,633	3,353	2,949	3,274
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(896)	617	(1,225)	817
Allowance for Loan and Lease Losses, Charge-offs	(18)	(679)	(156)	(834)
Allowance for Loan and Lease Losses, Recoveries of Bad Debts	126	24	277	58
Loans and Leases Receivable, Allowance, Ending Balance	1,845	3,315	1,845	3,315
Unallocated
Loans and Leases Receivable, Allowance, Beginning Balance	1,937	2,038	1,806	1,921
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(105)	(3)	26	114
Loans and Leases Receivable, Allowance, Ending Balance	$ 1,832	$ 2,035	$ 1,832	$ 2,035