Loans and Allowance for Loan Losses Schedule of Allowance for Loan Losses by Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	$ 0	$ 0
Allowance for loan losses, collectively evaluated for impairment	18,332	17,235
Allowance for loan losses	18,332	17,235
Commercial [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	4,131	3,875
Allowance for loan losses	4,131	3,875
Construction, land and land development [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	2,595	2,375
Allowance for loan losses	2,595	2,375
1-4 family residential first mortgages [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	247	216
Allowance for loan losses	247	216
Home equity [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	127	127
Allowance for loan losses	127	127
Commercial real estate [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	11,154	10,565
Allowance for loan losses	11,154	10,565
Consumer and other [Member]
Loans, Allowance for Loan Losses [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	78	77
Allowance for loan losses	$ 78	$ 77

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

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