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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]  
Useful lives used in computing depreciation
The useful lives used in computing depreciation are as follows:
 
Buildings and improvements
 
15 to 50 years
Furniture and equipment
 
3 to 10 years
Key assumptions used in measuring the fair value of MSR
Key assumptions used in measuring the fair value of MSR as of December 31 were as follows:
 
   
2013
  
2012
  
2011
 
           
Constant prepayment rate
  9.09%  25.58%  19.87%
Discount rate
  10.05%  11.05%  11.06%
Weighted average life (years)
  7.05   3.41   4.15