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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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