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Fair Value - Summary of Estimated Fair Values and Related Carrying amounts of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Assets
Cash and due from banks	$ 130,643	$ 117,945	$ 60,026
Securities available for sale	373,532	109,475
Restricted equity investments	22,518	11,173
Financial Liabilities
Noninterest-bearing deposits	706,088	333,051
Savings	150,376	78,352
Time deposits	499,502	251,443
FHLB borrowings	10,111	115,000
Subordinated debentures, net	39,986	24,506
Level 1 [Member]
Financial Assets
Cash and due from banks	130,643	117,945
Federal funds sold	43,903	775
Financial Liabilities
Noninterest-bearing deposits	706,088	333,051
Level 2 [Member]
Financial Assets
Securities available for sale		109,475
Restricted equity investments	22,518	11,173
Accrued interest receivable		5,428
Bank owned life insurance	46,545	15,724
Financial Liabilities
Interest-bearing deposits		282,263
Savings	150,376	78,352
FHLB borrowings		114,983
FRB borrowings	17,901	281,650
Level 3 [Member]
Financial Assets
PPP loans receivable, net	30,406	288,533
Loans held for investment, net	1,766,820	715,674
Financial Liabilities
Time deposits	503,968	257,647
Subordinated debentures, net	41,388	25,830
Carrying Amount
Financial Assets
Cash and due from banks	130,643	117,945
Federal funds sold	43,903	775
Securities available for sale	373,532	109,475
Restricted equity investments	22,518	11,173
PPP loans receivable, net	30,406	288,533
Loans held for investment, net	1,765,051	714,334
Accrued interest receivable	9,573	5,428
Bank owned life insurance	46,545	15,724
Financial Liabilities
Noninterest-bearing deposits	706,088	333,051
Interest-bearing deposits	941,805	282,263
Savings	150,376	78,352
Time deposits	499,502	251,443
FHLB borrowings	10,111	115,000
FRB borrowings	17,901	281,650
Subordinated debentures, net	39,986	24,506
Fair Value
Financial Assets
Cash and due from banks	130,643	117,945
Federal funds sold	43,903	775
Securities available for sale	373,532	109,475
Restricted equity investments	22,518	11,173
PPP loans receivable, net	30,406	288,533
Loans held for investment, net	1,766,820	715,674
Accrued interest receivable	9,573	5,428
Bank owned life insurance	46,545	15,724
Financial Liabilities
Noninterest-bearing deposits	706,088	333,051
Interest-bearing deposits	941,805	282,263
Savings	150,376	78,352
Time deposits	503,968	257,647
FHLB borrowings	9,943	114,983
FRB borrowings	17,901	281,650
Subordinated debentures, net	$ 41,388	$ 25,830

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