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Fair Value Measurement: Fair Value Measurements, Nonrecurring, Valuation Techniques (Details)
 12 Months Ended
Mar. 31, 2014
Impaired loans
  
Fair Value Measurements, Valuation Techniques Appraised value
Significant unobservable inputs Adjustment for market conditions
Real estate owned
  
Fair Value Measurements, Valuation Techniques Appraised value
Significant unobservable inputs Adjustment for market conditions
Minimum | Impaired loans
  
Market adjustment to appraisals 0.00%
Minimum | Real estate owned
  
Market adjustment to appraisals 0.00%
Maximum | Impaired loans
  
Market adjustment to appraisals 25.00%
Maximum | Real estate owned
  
Market adjustment to appraisals 19.00%