Allowance for Loan Losses: Impaired Financing Receivables (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 23,137	$ 23,270
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,530	9,298
Impaired Financing Receivable, Recorded Investment	27,667	32,568
Impaired Financing Receivable, Unpaid Principal Balance	31,332	38,006
Impaired Financing Receivable, Related Allowance	649	719
Commercial business
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,623	679
Impaired Financing Receivable, Recorded Investment	1,623	679
Impaired Financing Receivable, Unpaid Principal Balance	1,711	944
Commercial Real Estate
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	14,824	12,011
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,297	7,455
Impaired Financing Receivable, Recorded Investment	18,121	19,466
Impaired Financing Receivable, Unpaid Principal Balance	20,140	21,291
Impaired Financing Receivable, Related Allowance	532	536
Land
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,001	3,469
Impaired Financing Receivable, Recorded Investment	2,001	3,469
Impaired Financing Receivable, Unpaid Principal Balance	2,791	4,359
Multi-Family
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,532	3,846
Impaired Financing Receivable, Recorded Investment	2,532	3,846
Impaired Financing Receivable, Unpaid Principal Balance	2,564	4,802
Total consumer
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,157	3,090
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,233	1,843
Impaired Financing Receivable, Recorded Investment	3,390	4,933
Impaired Financing Receivable, Unpaid Principal Balance	4,126	5,799
Impaired Financing Receivable, Related Allowance	117	183
Real estate construction
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		175
Impaired Financing Receivable, Recorded Investment		175
Impaired Financing Receivable, Unpaid Principal Balance		$ 811