Subordinated Debt - Summary of Contractual Balance and Unamortized Fair Value Adjustments (Detail) - Trust Preferred Securities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 28,352	$ 28,352
Subordinated debentures fair market value adjustments	(4,044)	(4,406)
Total subordinated debentures	24,308	23,946
FCB Capital Trust II [Member]
Debt Instrument, Redemption [Line Items]
Subordinated debentures contractual balance	$ 10,310	$ 10,310
Subordinated debentures, Weighted Average Rate	6.17%	6.92%
Subordinated debentures, Weighted Average Term	9 years 3 months 18 days	10 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	5.87%	6.51%
Subordinated debentures, Weighted Average Term	11 years 6 months	12 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	7.20%	7.84%
Subordinated debentures, Weighted Average Term	7 years	8 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	5.78%	6.42%
Subordinated debentures, Weighted Average Term	9 years 8 months 12 days	10 years 8 months 12 days