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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, 2019	Dec. 31, 2018
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 342,941	$ 308,977
Borrowed funds, average balance	$ 316,073	$ 308,943
Borrowed funds, interest rate during period	2.95%	2.72%
Long-term borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 223,941	$ 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	$ 49	$ 119
Borrowed funds, interest rate during period	2.70%	2.43%
FHLB advances
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 308,500	$ 274,500
Borrowed funds, average balance	$ 280,539	$ 274,382
Borrowed funds, interest rate during period	2.20%	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	8.09%	7.94%
Subordinated notes payable(1)
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 23,722	$ 23,769
Borrowed funds, average balance	$ 24,772	$ 23,739
Borrowed funds, interest rate during period	7.93%	6.64%
Junior subordinated notes
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 10,044	$ 10,033
Borrowed funds, average balance	$ 10,038	$ 10,025
Borrowed funds, interest rate during period	11.05%	11.10%

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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