Basis of Accounting and Consolidation - Schedule of Impact of ASU 2016-13 Adoption of PCD Assets Previously Classified as PCI (Details) - USD ($)	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans	$ 54,597,000	$ 55,418,000	$ 41,910,000	$ 38,381,000	$ 32,876,000		$ 26,911,000
Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							26,911,000
ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						$ 28,583,000
ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						1,672,000
Construction and Land Development | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							1,146,000
Construction and Land Development | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						1,033,000
Construction and Land Development | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						(113,000)
1-4 Family Residential Properties | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							1,386,000
1-4 Family Residential Properties | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						2,142,000
1-4 Family Residential Properties | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						756,000
Commercial Real Estate | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							11,198,000
Commercial Real Estate | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						11,739,000
Commercial Real Estate | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						541,000
Commercial & Industrial | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							9,273,000
Commercial & Industrial | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						9,428,000
Commercial & Industrial | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						155,000
Financial Asset Acquired with Credit Deterioration | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							365,000
Financial Asset Acquired with Credit Deterioration | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						1,198,000
Financial Asset Acquired with Credit Deterioration | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						833,000
Financial Asset Acquired with Credit Deterioration | Construction and Land Development | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							0
Financial Asset Acquired with Credit Deterioration | Construction and Land Development | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						291,000
Financial Asset Acquired with Credit Deterioration | Construction and Land Development | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						291,000
Financial Asset Acquired with Credit Deterioration | 1-4 Family Residential Properties | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							6,000
Financial Asset Acquired with Credit Deterioration | 1-4 Family Residential Properties | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						48,000
Financial Asset Acquired with Credit Deterioration | 1-4 Family Residential Properties | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						42,000
Financial Asset Acquired with Credit Deterioration | Commercial Real Estate | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							359,000
Financial Asset Acquired with Credit Deterioration | Commercial Real Estate | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						818,000
Financial Asset Acquired with Credit Deterioration | Commercial Real Estate | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						459,000
Financial Asset Acquired with Credit Deterioration | Commercial & Industrial | Pre-ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans							$ 0
Financial Asset Acquired with Credit Deterioration | Commercial & Industrial | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						41,000
Financial Asset Acquired with Credit Deterioration | Commercial & Industrial | ASU 2016-13 | Impact of ASU
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses on loans						$ 41,000