Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and due from banks, noninterest-bearing	$ 128,228	$ 93,724
Securities held to maturity	513,825	167,551
Total loans, net of allowance	6,002,926	4,678,927
Accrued interest receivable	25,896	20,272
Bank-owned life insurance	165,786	106,974
SBA servicing asset	414,200	395,400
Accrued interest payable	607	904
Carrying Amount \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and due from banks, noninterest-bearing	128,228	93,724
Due from banks, interest-bearing	332,934	273,566
Accrued interest receivable	25,896	20,272
Bank-owned life insurance	165,786	106,974
Carrying Amount \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	513,825	167,551
Loans held for sale	61,003	6,077
Deposits	9,124,629	6,273,596
Borrowings	67,386	61,829
Accrued interest payable	607	904
Carrying Amount \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of allowance	6,002,926	4,678,927
SBA servicing asset	5,472	5,788
Estimated Fair Value \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and due from banks, noninterest-bearing	128,228	93,724
Due from banks, interest-bearing	332,934	273,566
Accrued interest receivable	25,896	20,272
Bank-owned life insurance	165,786	106,974
Estimated Fair Value \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	511,699	170,734
Loans held for sale	62,044	7,465
Deposits	9,124,701	6,275,329
Borrowings	61,295	53,321
Accrued interest payable	607	904
Estimated Fair Value \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans, net of allowance	5,990,235	4,661,197
SBA servicing asset	$ 5,546	$ 6,569

The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10))
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- Definition

For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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A bank's noninterest bearing demand deposits in other banks (such as correspondents).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount excluding accrued interest, after allowance for credit loss, of financing receivable.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

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-Publisher FASB
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