Carrying Amounts and Fair Value of Financial Instruments: Fair Value of Impaired Loans Policy (Details) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012
Impaired Loans Recorded Investment	$ 42,600,000	$ 40,800,000
Average Recorded Investment in Impaired Loans	$ 41,700,000	$ 34,300,000