Quarterly report pursuant to Section 13 or 15(d)

Fair Values of Assets and Liabilities (Significant unobservable Level 3 inputs) (Details 6)

v2.4.0.6
Fair Values of Assets and Liabilities (Significant unobservable Level 3 inputs) (Details 6) (Level 3 [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2013
MSRs [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
MSRs [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
MSRs [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
MSRs [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
MSRs [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
MSRs [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Maximum [Member]
Mar. 31, 2013
Derivative Instruments [Member]
Maximum [Member]
Market Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Maximum [Member]
Market Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Minimum [Member]
Mar. 31, 2013
Derivative Instruments [Member]
Minimum [Member]
Market Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Minimum [Member]
Market Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Weighted Average [Member]
Mar. 31, 2013
Derivative Instruments [Member]
Weighted Average [Member]
Market Approach Valuation Technique [Member]
Dec. 31, 2012
Derivative Instruments [Member]
Weighted Average [Member]
Market Approach Valuation Technique [Member]
Mar. 31, 2013
Municipal securities [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Municipal securities [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Municipal securities [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Municipal securities [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Municipal securities [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Municipal securities [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Private label CMO [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Private label CMO [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Private label CMO [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Private label CMO [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Private label CMO [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Private label CMO [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Asset-backed Securities [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Asset-backed Securities [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Asset-backed Securities [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Asset-backed Securities [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Asset-backed Securities [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Asset-backed Securities [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Automobile Loan [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Automobile Loan [Member]
Maximum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Automobile Loan [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Automobile Loan [Member]
Minimum [Member]
Cost Approach Valuation Technique [Member]
Mar. 31, 2013
Automobile Loan [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Dec. 31, 2012
Automobile Loan [Member]
Weighted Average [Member]
Cost Approach Valuation Technique [Member]
Quantitative information about level 3 fair value measurements                                                                              
Constant prepayment rate (CPR) 37.00% 31.00% 0.70% 10.00% 16.00% 20.00%                               26.70% 26.70% 5.10% 5.10% 14.30% 14.80% 5.10% 9.80% 5.10% 5.10% 5.10% 5.30% 15.60% 15.60% 15.60% 15.60% 15.60% 15.60%
Probability of default                                           4.00% 4.00% 0.10% 0.10% 1.30% 1.00%                        
Loss severity                                           64.00% 64.00% 0.00% 0.00% 26.50% 27.80% 69.00% 72.00% 69.00% 20.00% 69.00% 64.90%            
Discount rate                               12.00% 12.00% 1.70% 1.70% 3.20% 3.10% 7.90% 8.50% 3.00% 3.00% 5.90% 6.20% 16.30% 16.60% 4.30% 4.50% 8.90% 9.00% 5.00% 5.00% 0.20% 0.80% 1.30% 4.00%
Spread over forward interest rate swap rates 4,609.000 4,552.000 (499.000) (568.000) 1,306.000 1,288.000                                                                  
Net market price               12.30% 10.80%   (2.60%) (2.30%)   2.50% 3.00%                                                
Estimated pull thru %             89.00% 89.00%   38.00% 38.00%   75.00% 73.00%                                                  
Cumulative prepayment rate                                                       100.00% 100.00% 0.00% 0.00% 16.50% 6.90%            
Constant defualt rate                                                       4.00% 4.00% 1.50% 0.30% 2.70% 2.80%            
Cumulative default                                                       100.00% 100.00% 0.90% 1.10% 18.60% 20.10%            
Loss given default                                                       100.00% 100.00% 85.00% 85.00% 94.40% 92.40%            
Cure given deferral                                                       75.00% 90.00% 0.00% 0.00% 35.40% 34.70%