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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Details      
Outstanding commitments to extend credit $ 8,100    
Unused lines of credit 54,600    
Undisbursed construction loans 30,500    
Standby letters of credit 771,000 823,000  
Loans under warranty 119,200    
Loans and Leases Receivable, Commitments to Purchase or Sell 1,500 [1]    
Losses related to public depository funds $ 0 $ 0 $ 0
[1] Commitments to sell residential loans to the FHLMC. Typically, these agreements are short term fixed rate commitments and no material gain or loss is likely.