Borrowed Money Borrowing Text tag (Details) (USD $)	3 Months Ended	4 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2009	Mar. 31, 2012	Sep. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2003	Sep. 17, 2003
Short-term Debt [Line Items]
Borrowing limit from FHLB % of assets				25.00%
Federal Home Loan Bank, Advances, Activity for Year, Maximum Outstanding at any Month End				$ 159,600,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged				3,500,000
Loans Pledged as Collateral				113,600,000
Pledged Assets Separately Reported, Securities Pledged for Federal Home Loan Bank, at Fair Value				25,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds				26,900,000
Interest Expense, Medium-term Notes				100,000	100,000
Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term				800,000	1,500,000
Repurchase Agreements, Interest Expense Amount					1,800,000
Penalty for Early Withdrawal		353,000		(10,000)	(17,000)	(16,000)
subordinated debt issued shares								13,000
Liquidation amount subordinated debt								$ 1,000
Proceeds from Issuance of Long-term Debt							13,000,000
Proceeds from (Payments for) Other Financing Activities				32,974,000	(69,212,000)	(19,029,000)	400,000
Payments for Repurchase of Trust Preferred Securities							13,400,000
Debt Instrument, Basis Spread on Variable Rate				3.05%
Proceeds from Issuance of Subordinated Long-term Debt	5,000,000
Private placement subordinated debt interest rate 1st 7 years	7.00%
Private placement subordinated debt interest rate last 2 years	12.00%
Private placement subordinated debt reduced interest rate			2.00%
Accrued interest expense subordinated debt				700,000	300,000
Interest Expense, Subordinated Notes and Debentures				$ 600,000	$ 600,000