Borrowed Money Borrowed Money Text Tag (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			12 Months Ended
	Jun. 30, 2013	Sep. 30, 2011	Sep. 30, 2009	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2003	Sep. 17, 2003
Debt Disclosure [Abstract]
Effective Interest Rate, FHLB advance				2.13%
Borrowing limit from FHLB % of assets				30.00%
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available				$ 208,200
Federal Home Loan Bank of New York (“FHLB-NY”) stock, at cost				1,768	$ 2,171
Loans Pledged as Collateral				28,700
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds				17,700
Accrued interest FHLB				32	32
Financial Instruments, Owned and Pledged as Collateral, at Fair Value				27,700
Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term				542	584
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties	$ 25,000
Secured Debt, Repurchase Agreements				0	1,000
Interest Payable, Repurchase Agreement					3
Repurchase Agreements, Interest Expense Amount				$ 7
Available-for-sale Securities Pledged as Collateral					1,500
subordinated debt issued shares (in shares)							13,000
Liquidation amount subordinated debt (in dollars per share)							$ 1,000
Proceeds from Issuance of Long-term Debt						$ 13,000
Proceeds from (Payments for) Other Financing Activities						400
Payments for Repurchase of Trust Preferred Securities						$ 13,400
Debt Instrument, Basis Spread on Variable Rate				3.05%
Decrease in Subordinated Debt Interest Payable				$ 2,500
Private placement subordinated debt			$ 5,000
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				914	315
Interest Expense, Subordinated Notes and Debentures				$ 625	$ 670