Derivative Financial Instruments - Schedule of Interest Rate Swaps, Unsecured Debt Hedges (Details) - Junior Subordinated Debt [Member] - Maturity 2036 [Member] - Interest Rate Swap [Member] - Unsecured Debt Hedges [Member] - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
---|---|---|
Derivative [Line Items] | ||
Notional amount | $ 25,000 | $ 25,000 |
Weighted average fixed rate paid by the Company | 4.28% | 4.28% |