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Loans and Allowance for Loan Losses - Summary of Accounts Notes Loans and Financing Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	$ 2,316,726	$ 1,025,687
Less: Deferred loan fees, net of costs	(12,184)	(4,271)
Total	2,304,542	1,021,416
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	286,835	123,675
Paycheck Protection Program [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	608,692	292,068
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	65,210	46,684
Grade 1 Prime [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	611,401	293,680
Grade 1 Prime [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	1,218	844
Grade 1 Prime [Member] | Paycheck Protection Program [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	608,692	292,068
Grade 1 Prime [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	398	324
Grade 2 Desirable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	13,505	10,240
Grade 2 Desirable [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	552	484
Grade 2 Desirable [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	23	36
Grade 3 Good [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	849,161	293,903
Grade 3 Good [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	125,985	23,828
Grade 3 Good [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	18,806	17,062
Grade 4 Acceptable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	633,672	366,106
Grade 4 Acceptable [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	128,054	85,928
Grade 4 Acceptable [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	42,638	28,033
Grade 5 Pass/Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	95,301	41,695
Grade 5 Pass/Watch [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	13,434	7,251
Grade 5 Pass/Watch [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	2,191	521
Grade 6 Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	85,364	3,349
Grade 6 Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	7,300	4
Grade 6 Special Mention [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	497	1
Grade 7 Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	28,322	16,714
Grade 7 Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	10,292	5,336
Grade 7 Substandard [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	657	707
Real Estate [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	155,631	54,702
Real Estate [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	49,338	18,040
Real Estate [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	649,474	273,499
Real Estate [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	496,301	213,404
Real Estate [Member] | Mortgage, Farmland [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	5,245	3,615
Real Estate [Member] | Grade 1 Prime [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	147
Real Estate [Member] | Grade 1 Prime [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	536
Real Estate [Member] | Grade 1 Prime [Member] | Mortgage, Farmland [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	410	444
Real Estate [Member] | Grade 2 Desirable [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	650	2,143
Real Estate [Member] | Grade 2 Desirable [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	74
Real Estate [Member] | Grade 2 Desirable [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	2,645	3,994
Real Estate [Member] | Grade 2 Desirable [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	9,561	3,583
Real Estate [Member] | Grade 3 Good [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	36,028	19,524
Real Estate [Member] | Grade 3 Good [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	21,005	3,073
Real Estate [Member] | Grade 3 Good [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	316,340	128,163
Real Estate [Member] | Grade 3 Good [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	329,777	101,078
Real Estate [Member] | Grade 3 Good [Member] | Mortgage, Farmland [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	1,220	1,175
Real Estate [Member] | Grade 4 Acceptable [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	78,234	26,324
Real Estate [Member] | Grade 4 Acceptable [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	20,622	8,247
Real Estate [Member] | Grade 4 Acceptable [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	228,523	114,977
Real Estate [Member] | Grade 4 Acceptable [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	131,986	100,601
Real Estate [Member] | Grade 4 Acceptable [Member] | Mortgage, Farmland [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	3,615	1,996
Real Estate [Member] | Grade 5 Pass/Watch [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	9,045	5,916
Real Estate [Member] | Grade 5 Pass/Watch [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	7,228	6,458
Real Estate [Member] | Grade 5 Pass/Watch [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	47,630	15,799
Real Estate [Member] | Grade 5 Pass/Watch [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	15,773	5,750
Real Estate [Member] | Grade 6 Special Mention [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	29,605	218
Real Estate [Member] | Grade 6 Special Mention [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	45,092	2,968
Real Estate [Member] | Grade 6 Special Mention [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	2,870	158
Real Estate [Member] | Grade 7 Substandard [Member] | Construction, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	2,069	577
Real Estate [Member] | Grade 7 Substandard [Member] | Construction, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	262	262
Real Estate [Member] | Grade 7 Substandard [Member] | Mortgage, Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	9,244	7,598
Real Estate [Member] | Grade 7 Substandard [Member] | Mortgage, Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	$ 5,798	$ 2,234

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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