Loans and Allowance for Credit Losses - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2026 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Unamortized net deferred fees	$ 17,620	$ 17,620		$ 17,630
Transfer of loans held for investment to loans held for sale		238,485	$ 158,916
Servicing asset	293,600	293,600		81,500
Net loans	6,442,573	6,442,573		7,120,855
Loans transfer to HFS		36,700		176,500
Payment for purchase, loan, mortgage, held for sale	102,000
Initial allowance on purchased seasoned loans	942	942
ADC Loans
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Net loans	$ 831,300	$ 831,300
Percent of ADC loan portfolio using interest reserves	31.00%	31.00%
Commercial
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Transfer of loans held for investment to loans held for sale		$ 238,500
Loan and lease, financing receivables on nonaccrual	$ 13,500	13,500		90,700
Loan and lease, financing receivables on nonaccrual		13,500		$ 90,700
Initial allowance on purchased seasoned loans	0	$ 0
Commercial | Maximum
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Loan period (in years)		10 years
Loan period, preferred term (in years)		7 years
Amortization term (in years)		25 years
Commercial | Minimum
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Loan period, preferred term (in years)		5 years
Real estate mortgage - residential:
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Initial allowance on purchased seasoned loans	$ 942	$ 942
Real estate mortgage - residential: | Maximum | Land Acquisition Development and Construction Loans
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Loan term (in months)		36 months
Consumer | Maximum | Land Acquisition Development and Construction Loans
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Loan term (in months)		24 months
Income Producing Commercial Real Estate and Real Estate Construction
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Minimum cash flow debt service coverage ratio	1.15	1.15
Stress test assumption increase interest rates	2.00%	2.00%