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, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Collateralized debt obligations [Member] | ||||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||
| Beginning balance | $ 14,347 | $ 20,230 | $ 20,254 | $ 22,211 |
| Included in other comprehensive income | 371 | (303) | (5,536) | (2,284) |
| Ending Balance | $ 14,718 | 19,927 | $ 14,718 | 19,927 |
| Interest Rate Swap [Member] | ||||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||
| Beginning balance | (66) | |||
| Included in other comprehensive income | 66 | |||
| Ending balance | $ 0 | $ 0 | ||