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Fair Value of Financial Instruments (Reconciliation of Fair Valued Assets Measured on a Recurring Basis) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Collateralized debt obligations [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance $ 22,211 $ 25,339
Included in other comprehensive income (2,679) 3,052
Ending Balance 19,532 28,391
Interest Rate Swap [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance (66) (199)
Included in other comprehensive income 33 35
Ending balance $ (33) $ (164)