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Fair Value Of Financial Instruments (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
security
Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Amortized Cost $ 383,748 $ 368,319
Available-for-sale Securities 361,465 336,589
Collateralized debt obligations [Member]
    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Acquired Trust Preferred Securities, Number of Securities 18  
Amortized Cost 37,249 37,146
Available-for-sale Securities $ 23,093 $ 17,538