Allowance for Loan Losses: Financing Receivables, Aging of loans (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Financing Receivable Recorded Investment, 30 to 89 days past due	$ 3,749	$ 8,849
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	28,031	44,163
Financing Receivable, Recorded Investment, Past Due	31,780	53,012
Financing Receivable, Recorded Investment, Current	550,418	631,797
Commercial business
Financing Receivable Recorded Investment, 30 to 89 days past due	734	535
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1,945	3,930
Financing Receivable, Recorded Investment, Past Due	2,679	4,465
Financing Receivable, Recorded Investment, Current	72,274	82,773
Commercial Real Estate
Financing Receivable Recorded Investment, 30 to 89 days past due	1,045	5,733
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	11,334	13,950
Financing Receivable, Recorded Investment, Past Due	12,379	19,683
Financing Receivable, Recorded Investment, Current	309,702	333,397
Land
Financing Receivable Recorded Investment, 30 to 89 days past due		128
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	3,744	12,985
Financing Receivable, Recorded Investment, Past Due	3,744	13,113
Financing Receivable, Recorded Investment, Current	23,518	25,775
Multi-Family
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	6,062	1,627
Financing Receivable, Recorded Investment, Past Due	6,062	1,627
Financing Receivable, Recorded Investment, Current	30,310	41,168
Real estate construction
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1,483	7,756
Financing Receivable, Recorded Investment, Past Due	1,483	7,756
Financing Receivable, Recorded Investment, Current	15,437	18,035
Total consumer
Financing Receivable Recorded Investment, 30 to 89 days past due	1,970	2,453
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	3,463	3,915
Financing Receivable, Recorded Investment, Past Due	5,433	6,368
Financing Receivable, Recorded Investment, Current	$ 99,177	$ 130,649