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FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Composition of Borrowed Funds) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 177,899 | $ 69,680
Borrowed funds, average balance | $ 118,929 | $ 50,945
Borrowed funds, interest rate during period | 3.38% | 6.03%
Long-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 123,389 | $ 49,092
Short-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 54,510 | 20,588
Federal funds purchased |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 0 | 0
Borrowed funds, average balance | $ 88 | $ 178
Borrowed funds, interest rate during period | 1.21% | 0.92%
FHLB advances |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 143,500 | $ 33,578
Borrowed funds, average balance | $ 83,987 | $ 14,485
Borrowed funds, interest rate during period | 1.24% | 0.97%
Line of credit |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 10 | $ 1,010
Borrowed funds, average balance | $ 435 | $ 2,079
Borrowed funds, interest rate during period | 3.63% | 3.26%
Other borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 675 | $ 2,590
Borrowed funds, average balance | $ 1,432 | $ 1,739
Borrowed funds, interest rate during period | 15.37% | 7.64%
Subordinated notes payable |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 23,699 | $ 22,498
Borrowed funds, average balance | $ 22,978 | $ 22,467
Borrowed funds, interest rate during period | 7.04% | 7.13%
Junior subordinated notes |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 10,015 | $ 10,004
Borrowed funds, average balance | $ 10,009 | $ 9,997
Borrowed funds, interest rate during period | 11.08% | 11.07%

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