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Long -Term Borrowings - Debentures and Related Weighted Average Interest Rates (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Amount	$ 281,817	$ 280,221
Weighted-Average Rate	6.19%	6.88%
United Statutory Trust III [Member]
Debt Instrument [Line Items]
Amount	$ 20,619	$ 20,619
Weighted-Average Rate	6.82%	7.46%
United Statutory Trust IV [Member]
Debt Instrument [Line Items]
Amount	$ 25,774	$ 25,774
Weighted-Average Rate	6.95%	7.70%
United Statutory Trust V [Member]
Debt Instrument [Line Items]
Amount	$ 51,547	$ 51,547
Weighted-Average Rate	5.80%	6.40%
United Statutory Trust VI [Member]
Debt Instrument [Line Items]
Amount	$ 30,928	$ 30,928
Weighted-Average Rate	5.28%	5.92%
Premier Statutory Trust II [Member]
Debt Instrument [Line Items]
Amount	$ 6,186	$ 6,186
Weighted-Average Rate	7.27%	8.02%
Premier Statutory Trust III [Member]
Debt Instrument [Line Items]
Amount	$ 8,248	$ 8,248
Weighted-Average Rate	5.72%	6.95%
Premier Statutory Trust IV [Member]
Debt Instrument [Line Items]
Amount	$ 14,433	$ 14,433
Weighted-Average Rate	5.50%	6.15%
Premier Statutory Trust V [Member]
Debt Instrument [Line Items]
Amount	$ 10,310	$ 10,310
Weighted-Average Rate	5.66%	6.37%
Centra Statutory Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 10,000	$ 10,000
Weighted-Average Rate	6.25%	6.91%
Centra Statutory Trust II [Member]
Debt Instrument [Line Items]
Amount	$ 10,000	$ 10,000
Weighted-Average Rate	5.82%	6.57%
Virginia Commerce Trust II [Member]
Debt Instrument [Line Items]
Amount	$ 13,857	$ 13,627
Weighted-Average Rate	7.34%	8.31%
Virginia Commerce Trust III [Member]
Debt Instrument [Line Items]
Amount	$ 20,425	$ 19,899
Weighted-Average Rate	5.56%	6.20%
Cardinal Statutory Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 17,209	$ 16,812
Weighted-Average Rate	6.38%	7.02%
UFBC Capital Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 4,182	$ 4,076
Weighted-Average Rate	6.08%	6.72%
Carolina Financial Capital Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 5,058	$ 5,046
Weighted-Average Rate	7.25%	8.00%
Carolina Financial Capital Trust II [Member]
Debt Instrument [Line Items]
Amount	$ 9,706	$ 9,641
Weighted-Average Rate	7.22%	7.97%
Greer Capital Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 5,492	$ 5,419
Weighted-Average Rate	6.35%	7.09%
Greer Capital Trust II [Member]
Debt Instrument [Line Items]
Amount	$ 4,360	$ 4,275
Weighted-Average Rate	5.83%	6.58%
First South Preferred Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 9,656	$ 9,587
Weighted-Average Rate	6.90%	7.54%
BOE Statutory Trust I [Member]
Debt Instrument [Line Items]
Amount	$ 3,827	$ 3,794
Weighted-Average Rate	6.93%	7.59%

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- Definition

Carrying value as of the balance sheet date of long-term debt with maturities initially due after one year or beyond the operating cycle if longer identified as Junior Subordinated Notes, which have a lower priority than senior instruments, excluding current portion.

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