Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Assets [Abstract]
Interest bearing deposits - time		$ 498	$ 595
Equity securities at fair value		0	393
Securities available for sale		430,305	427,926
Federal Home Loan Bank and Federal Reserve Bank Stock		18,359	18,359
Liabilities [Abstract]
Other borrowings		41,144	25,700
Subordinated debentures		39,422	39,388
Reciprocal deposits included in deposits with no stated maturity		270,864	123,080
Reciprocal deposits included in deposits with stated maturity		55,462	58,992
Recorded Book Balance [Member]
Assets [Abstract]
Cash and due from banks		34,461	23,350
Interest bearing deposits		20,676	46,894
Interest bearing deposits - time		498	595
Equity securities at fair value			393
Securities available for sale		430,305	427,926
Federal Home Loan Bank and Federal Reserve Bank Stock		18,359	18,359
Net loans and loans held for sale		2,743,506	2,643,856
Accrued interest receivable		10,816	10,164
Derivative financial instruments		6,233	5,155
Liabilities [Abstract]
Deposits with no stated maturity	[1]	2,294,255	2,197,494
Deposits with stated maturity	[1]	684,630	715,934
Other borrowings		41,144	25,700
Subordinated debentures		39,422	39,388
Accrued interest payable		1,668	1,646
Derivative financial instruments		4,217	2,326
Fair Value [Member]
Assets [Abstract]
Cash and due from banks		34,461	23,350
Interest bearing deposits		20,676	46,894
Interest bearing deposits - time		498	594
Equity securities at fair value			393
Securities available for sale		430,305	427,926
Net loans and loans held for sale		2,747,828	2,606,256
Accrued interest receivable		10,816	10,164
Derivative financial instruments		6,233	5,155
Liabilities [Abstract]
Deposits with no stated maturity		2,294,255	2,197,494
Deposits with stated maturity		683,547	711,312
Other borrowings		41,271	25,706
Subordinated debentures		33,214	35,021
Accrued interest payable		1,668	1,646
Derivative financial instruments		4,217	2,326
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and due from banks		34,461	23,350
Interest bearing deposits		20,676	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		2,294,255	2,197,494
Deposits with stated maturity		0	0
Other borrowings		0	0
Subordinated debentures		0	0
Accrued interest payable		128	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		498	594
Equity securities at fair value			0
Securities available for sale		430,305	427,926
Net loans and loans held for sale		62,883	44,753
Accrued interest receivable		1,634	1,789
Derivative financial instruments		6,233	5,155
Liabilities [Abstract]
Deposits with no stated maturity		0	0
Deposits with stated maturity		683,547	711,312
Other borrowings		41,271	25,706
Subordinated debentures		33,214	35,021
Accrued interest payable		1,540	1,532
Derivative financial instruments		4,217	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		2,684,945	2,520,032
Accrued interest receivable		9,181	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 $270.864 million and $123.080 million at June 30, 2019 and December 31, 2018, respectively. Deposits with a stated maturity include reciprocal deposits with a recorded book balance of $55.462 million and $58.992 million at June 30, 2019 and December 31, 2018, respectively.