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Loans and Allowance for Loan Losses Performing and Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,777,239	$ 1,323,258
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,743,081	1,290,464
All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,739,522	1,287,823
All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,559	2,641
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	34,158	32,794
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	860,027	642,988
Commercial Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	842,345	625,085
Commercial Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	841,709	624,638
Commercial Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	636	447
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,682	17,903
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	407,254	293,457
Consumer Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	398,542	286,007
Consumer Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	397,306	284,585
Consumer Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,236	1,422
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,712	7,450
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	187,895	135,409
Construction and Land Development [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	183,293	130,289
Construction and Land Development [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	182,746	129,742
Construction and Land Development [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	547	547
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,602	5,120
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	308,254	238,087
Commercial and Industrial [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	305,697	237,229
Commercial and Industrial [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	304,673	237,016
Commercial and Industrial [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,024	213
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,557	858
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,809	13,317
Consumer and Other [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,204	11,854
Consumer and Other [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,088	11,842
Consumer and Other [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	116	12
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 605	$ 1,463

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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