Loan and Lease Losses Text Figures (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 37,400,000	$ 44,400,000	$ 47,600,000
Financing Receivable, Modifications, Recorded Investment	500,000	3,400,000
Loan with Forebearance Agreeements	1,900,000	12,900,000
Number of TDR loans on accrual status	9
Loans Pledged as Collateral	113,600,000
Financing Receivable, Individually Evaluated for Impairment	31,022,000	36,032,000		69,600,000
Number of securities with unrealized loss	13	14
Financing Receivable, Recorded Investment, Current	331,218,000	332,397,000
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	30,626,000	54,588,000
Loans moved to Held for Sale	11
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	21,700,000	21,042,000
Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Additions to Held-for-sale	10,500,000
Proceeds from Sale and Collection of Loans Held-for-sale	25,600,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	9,072,000	31,464,000
TDR Loans on Accrual Status	5,000,000
Other non-performing asset	15,500,000
Other OREO of 9 foreclosed properties	2,400,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2,311,000	949,000	4,200,000
Financing Receivable, Recorded Investment, Nonaccrual Status	14,300,000
Impaired and non performing TDR loans	16,685,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	$ 3,200,000	$ 8,400,000	$ 7,500,000