Fair Value of Assets and Liabilities (FV on recurring or nonrecurring basis-level 3 inputs) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Interest Rate Lock Commitments | Pricing Model
   
Summary of the significant unobservable inputs    
Weighted Average Closing Ratio (as a percent) 94.11% 93.76%
Net Derivative Financial Instruments Not Designated as Hedging Instruments, at Fair Value $ 443 $ 536
Interest Rate Swap Agreements | Discounted Cash Flow
   
Summary of the significant unobservable inputs    
Weighted Average Credit Factor (as a percent) 0.77% 0.74%
Net Derivative Financial Instruments Not Designated as Hedging Instruments, at Fair Value (154) (157)
Mortgage Servicing Rights | Discounted Cash Flow
   
Summary of the significant unobservable inputs    
Weighted Average Constant Prepayment Rate (as a percent) 9.03% 7.98%
Weighted Average Discount Rate (as a percent) 9.75% 9.70%
Mortgage Servicing Rights, at Fair Value $ 31,684 $ 33,926