Business Combinations - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 01, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill	$ 7,768,000	$ 8,140,000		$ 8,140,000		$ 8,140,000	[1]
Other intangible assets		7,600,000	$ 8,600,000	7,600,000	$ 8,600,000	8,500,000
Short-term borrowings	13,055,000
Junior subordinated debt	$ (3,334,000)
Fauquier Bankshares, Inc [Member]
Business Acquisition [Line Items]
Acquisition date	Apr. 01, 2021
Equity interest issued or issuable share ratio	0.675
Business combination consideration issued in shares	2,571,213
Business combination consideration paid in cash	$ 4,000
Goodwill	7,800,000
Other intangible assets	9,700,000
Loan aggregate outstanding principal	622,900,000
Estimated fair value of loan	602,600,000					$ 611,000
Allowance for loan losses	20,300,000
Adjustment for market interest rates, net of deferred costs	21,300,000
Deferred fees/costs	979,000
Short-term borrowings	12,582,000
Junior subordinated debt	(4,124,000)
Merger and merger related expenses		$ 0	$ 5,900,000	$ 0	$ 6,200,000
Allowance for loan losses	7,200,000
Fauquier Bankshares, Inc [Member] | Fair Value Adjustment [Member]
Business Acquisition [Line Items]
Short-term borrowings	473,000
Junior subordinated debt	790,000
Fauquier Bankshares, Inc [Member] | Certificates of Deposit [Member]
Business Acquisition [Line Items]
Estimated fair value adjustment of certificates of deposit	$ 191,000
Certificates of Deposit Amortization Period	36 months
Fauquier Bankshares, Inc [Member] | Certificates of Deposit [Member] | Minimum [Member]
Business Acquisition [Line Items]
Certificates of deposit maturity	1 month
Fauquier Bankshares, Inc [Member] | Certificates of Deposit [Member] | Maximum [Member]
Business Acquisition [Line Items]
Certificates of deposit maturity	3 years
Fauquier Bankshares, Inc [Member] | Performing Loans [Member]
Business Acquisition [Line Items]
Fair value of loans	$ 513,800,000
Percentage of loans less than book value of loans	1.70%
Total fair value discount on performing loans	$ 9,000,000.0
Credit discount	8,400,000
Other fair value discount	647,000
Fauquier Bankshares, Inc [Member] | PCI Loans [Member]
Business Acquisition [Line Items]
Fair value of loans	$ 87,300,000
Percentage of loans less than book value of loans	12.30%
Credit discount	$ 11,200,000
Other fair value discount	1,100,000
Total fair value on PCI loans	$ 12,300,000
Fauquier Bankshares, Inc [Member] | Core Deposit [Member]
Business Acquisition [Line Items]
Core deposit intangible asset, amortization period	7 years
Estimated core deposit intangibles	$ 9,700,000
Percentage of core deposits intangibles estimated	1.30%

[1] Derived from audited Consolidated Financial Statements