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FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Composition of Borrowed Funds) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 279,995 | $ 308,977
Borrowed funds, average balance | $ 302,472 | $ 308,943
Borrowed funds, interest rate during period | 2.82% | 2.72%
Long-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 160,995 | $ 172,477
Short-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 119,000 | 136,500
Federal funds purchased |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 0 | 0
Borrowed funds, average balance | $ 0 | $ 119
Borrowed funds, interest rate during period | 0.00% | 2.43%
FHLB advances |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 245,500 | $ 274,500
Borrowed funds, average balance | $ 267,989 | $ 274,382
Borrowed funds, interest rate during period | 2.16% | 2.06%
Line of credit |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 0 | $ 0
Borrowed funds, average balance | $ 0 | $ 3
Borrowed funds, interest rate during period | 0.00% | 4.47%
Other borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 675 | $ 675
Borrowed funds, average balance | $ 675 | $ 675
Borrowed funds, interest rate during period | 8.00% | 7.94%
Subordinated notes payable |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 23,783 | $ 23,769
Borrowed funds, average balance | $ 23,774 | $ 23,739
Borrowed funds, interest rate during period | 6.63% | 6.64%
Junior subordinated notes |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 10,037 | $ 10,033
Borrowed funds, average balance | $ 10,034 | $ 10,025
Borrowed funds, interest rate during period | 10.92% | 11.10%

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