Subordinated Debt - Summary of Contractual Balance and Unamortized Fair Value Adjustments (Detail) - Trust Preferred Securities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 28,352	$ 28,352
Subordinated debentures fair market value adjustments	(4,406)	(4,758)
Total subordinated debentures	23,946	23,594
FCB Capital Trust II [Member]
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 10,310	$ 10,310
Subordinated debentures, Weighted Average Rate	6.92%	7.66%
Subordinated debentures, Weighted Average Term	10 years 3 months 18 days	11 years 3 months 18 days
FCB Capital Trust III [Member]
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 5,155	$ 5,155
Subordinated debentures, Weighted Average Rate	6.51%	7.54%
Subordinated debentures, Weighted Average Term	12 years 6 months	13 years 6 months
Community First Statutory Trust I [Member]
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 5,155	$ 5,155
Subordinated debentures, Weighted Average Rate	7.84%	8.87%
Subordinated debentures, Weighted Average Term	8 years	9 years
American State Bank Statutory Trust I [Member]
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 7,732	$ 7,732
Subordinated debentures, Weighted Average Rate	6.42%	7.45%
Subordinated debentures, Weighted Average Term	10 years 8 months 12 days	11 years 8 months 12 days