Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Assets [Abstract]
Interest bearing deposits - time		$ 499	$ 595
Equity securities at fair value		0	393
Securities available for sale		439,592	427,926
Federal Home Loan Bank and Federal Reserve Bank Stock		18,359	18,359
Liabilities [Abstract]
Other borrowings		63,974	25,700
Subordinated debentures		39,439	39,388
Reciprocal deposits included in deposits with no stated maturity		367,180	123,080
Reciprocal deposits included in deposits with stated maturity		49,020	58,992
Recorded Book Balance [Member]
Assets [Abstract]
Cash and due from banks		38,662	23,350
Interest bearing deposits		43,755	46,894
Interest bearing deposits - time		499	595
Equity securities at fair value			393
Securities available for sale		439,592	427,926
Federal Home Loan Bank and Federal Reserve Bank Stock		18,359	18,359
Net loans and loans held for sale		2,820,278	2,643,856
Accrued interest receivable		10,480	10,164
Derivative financial instruments		7,389	5,155
Liabilities [Abstract]
Deposits with no stated maturity	[1]	2,429,013	2,197,494
Deposits with stated maturity	[1]	623,299	715,934
Other borrowings		63,974	25,700
Subordinated debentures		39,439	39,388
Accrued interest payable		1,610	1,646
Derivative financial instruments		5,657	2,326
Fair Value [Member]
Assets [Abstract]
Cash and due from banks		38,662	23,350
Interest bearing deposits		43,755	46,894
Interest bearing deposits - time		500	594
Equity securities at fair value			393
Securities available for sale		439,592	427,926
Net loans and loans held for sale		2,841,484	2,606,256
Accrued interest receivable		10,480	10,164
Derivative financial instruments		7,389	5,155
Liabilities [Abstract]
Deposits with no stated maturity		2,429,013	2,197,494
Deposits with stated maturity		623,916	711,312
Other borrowings		63,930	25,706
Subordinated debentures		32,427	35,021
Accrued interest payable		1,610	1,646
Derivative financial instruments		5,657	2,326
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and due from banks		38,662	23,350
Interest bearing deposits		43,755	46,894
Interest bearing deposits - time		0	0
Equity securities at fair value			393
Securities available for sale		0	0
Net loans and loans held for sale		0	41,471
Accrued interest receivable		1	22
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity		2,429,013	2,197,494
Deposits with stated maturity		0	0
Other borrowings		0	0
Subordinated debentures		0	0
Accrued interest payable		100	114
Derivative financial instruments		0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Cash and due from banks		0	0
Interest bearing deposits		0	0
Interest bearing deposits - time		500	594
Equity securities at fair value			0
Securities available for sale		439,592	427,926
Net loans and loans held for sale		125,013	44,753
Accrued interest receivable		1,995	1,789
Derivative financial instruments		7,389	5,155
Liabilities [Abstract]
Deposits with no stated maturity		0	0
Deposits with stated maturity		623,916	711,312
Other borrowings		63,930	25,706
Subordinated debentures		32,427	35,021
Accrued interest payable		1,510	1,532
Derivative financial instruments		5,657	2,326
Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and due from banks		0	0
Interest bearing deposits		0	0
Interest bearing deposits - time		0	0
Equity securities at fair value			0
Securities available for sale		0	0
Net loans and loans held for sale		2,716,471	2,520,032
Accrued interest receivable		8,484	8,353
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity		0	0
Deposits with stated maturity		0	0
Other borrowings		0	0
Subordinated debentures		0	0
Accrued interest payable		0	0
Derivative financial instruments		$ 0	$ 0

[1] Deposits with no stated maturity include reciprocal deposits with a recorded book balance of $367.180 million and $123.080 million at September 30, 2019 and December 31, 2018, respectively. Deposits with a stated maturity include reciprocal deposits with a recorded book balance of $49.020 million and $58.992 million at September 30, 2019 and December 31, 2018, respectively.