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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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Collateralized debt obligations [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance $ 20,230 $ 30,046 $ 22,211 $ 25,339
Included in other comprehensive income (303) 1,882 (2,284) 6,589
Ending Balance 19,927 31,928 19,927 31,928
Interest Rate Swap [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance 0 (140) (66) (199)
Included in other comprehensive income 0 33 66 92
Ending balance $ 0 $ (107) $ 0 $ (107)