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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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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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The average effective interest rate during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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