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Derivative Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Derivatives not designated as hedging instruments, fair value    
Interest rate swap contracts not designated as hedging instruments - assets, gross $ 665 $ 946
Interest rate swap contracts not designated as hedging instruments - liabilities, gross $ 665 $ 946
Other assets
   
Derivatives not designated as hedging instruments, fair value    
Description of location of interest rate derivative instruments not designated as hedging instruments on balance sheet Other assets Other assets
Other liabilities
   
Derivatives not designated as hedging instruments, fair value    
Description of location of interest rate derivative instruments not designated as hedging instruments on balance sheet Other liabilities Other liabilities