Fair Value Measurements - Summary of Estimated Fair Values and Carrying Values of Financial Instruments (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Financial assets
Cash and cash equivalents	$ 371,320,000	$ 327,025,000
Interest bearing time deposits in other banks	132,000	131,000
Investment securities available for sale	126,218,000	26,432,000
Non-marketable securities	11,327,000	7,527,000
Accrued interest receivable	12,648,000	10,228,000
Bank-owned life insurance	26,671,000	26,528,000
Total assets	3,040,388,000	2,499,412,000
Loans, including held for sale, net	2,424,633,000	2,049,429,000
Financial liabilities
Deposits	2,587,169,000	2,141,199,000
Accrued interest payable	387,000	437,000
FHLB advances	50,000,000	50,000,000
Total liabilities	2,739,185,000	2,200,405,000
Carrying Value | Level 2 Inputs
Financial assets
Cash and cash equivalents	371,320,000	327,025,000
Interest bearing time deposits in other banks	132	131
Investment securities available for sale	126,218	26,432
Non-marketable securities	11,327	7,527
Accrued interest receivable	12,648	10,228
Bank-owned life insurance	26,671	26,528
Derivative instruments assets	3,873	389
Total assets	552,189	398,260
Financial liabilities
Deposits	2,587,169,000	2,141,199,000
Accrued interest payable	387,000	437,000
FHLB advances	50,000,000	50,000,000
Notes payable	81,507	1,000
Derivative instrument liabilities	3,909	389
Total liabilities	2,722,972	2,193,025
Carrying Value | Level 3 Inputs
Financial assets
Loans, including held for sale, net	2,424,633,000	2,049,429,000
Estimated Fair Value | Level 2 Inputs
Financial assets
Cash and cash equivalents	371,320,000	327,025,000
Interest bearing time deposits in other banks	132	131
Investment securities available for sale	126,218	26,432
Non-marketable securities	11,327	7,527
Accrued interest receivable	12,648	10,228
Bank-owned life insurance	26,671	26,528
Derivative instruments assets	3,873	389
Total assets	552,189	398,260
Financial liabilities
Deposits	2,587,827,000	2,141,999,000
Accrued interest payable	387,000	437,000
FHLB advances	50,000,000	50,000,000
Notes payable	81,507	1,000
Derivative instrument liabilities	3,909	389
Total liabilities	2,723,630	2,193,825
Estimated Fair Value | Level 3 Inputs
Financial assets
Loans, including held for sale, net	$ 2,391,904,000	$ 2,023,761,000