Business Combinations - Narrative (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Jul. 01, 2026 USD ($)	Oct. 01, 2025 USD ($) branch $ / shares	Jul. 11, 2025 USD ($) branch $ / shares	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Business Combination [Line Items]
Goodwill				$ 1,045,014		$ 1,045,014			$ 1,034,735
Allowance for credit losses				191,355	$ 147,453	191,355	$ 147,453	$ 182,050	$ 178,803	$ 142,184	$ 138,055
Allowance on PCD Loans Acquired				$ 8,399	$ 106	$ 8,399	$ 106
Villages Bancorporation, Inc.
Business Combination [Line Items]
Number of branches operated | branch		19
Percentage of common stock acquired		100.00%
Per share cash consideration for shares receiving cash (in dollars per share) | $ / shares		$ 1,000
Per share exchange ratio for shares receiving stock		38.5000
Acquiree shares receiving cash consideration		25.00%
Acquiree shares receiving stock consideration		75.00%
Common stock threshold of outstanding stock that will receive preferred stock		9.75%
Total consideration		$ 829,145
Goodwill		287,506
Allowance for credit losses		34,100
Allowance on PCD Loans Acquired		$ 11,400
Intangible assets weighted average useful life		10 years
Book value of loans with deterioration of credit quality		$ 160,846
Book balance of loans at acquisition		191,770
Customer relationship intangible asset		110,548
Villages Bancorporation, Inc. | Acquired Non-PCD Loans
Business Combination [Line Items]
Allowance for credit losses		$ 22,700
Heartland Bancshares, Inc
Business Combination [Line Items]
Number of branches operated | branch			4
Percentage of common stock acquired			100.00%
Per share cash consideration for shares receiving cash (in dollars per share) | $ / shares			$ 147.10
Per share exchange ratio for shares receiving stock			4.9263
Total consideration			$ 111,224
Goodwill			22,228
Allowance for credit losses			2,000
Allowance on PCD Loans Acquired			$ 100
Intangible assets weighted average useful life			10 years
Book value of loans with deterioration of credit quality			$ 7,200
Book balance of loans at acquisition			6,400
Customer relationship intangible asset			20,922
Heartland Bancshares, Inc | Acquired Non-PCD Loans
Business Combination [Line Items]
Allowance for credit losses			$ 1,900
W. L. Hunter Insurance Agency, LLC
Business Combination [Line Items]
Total consideration	$ 5,800
Goodwill	2,900
Goodwill deductible for tax purposes	0
W. L. Hunter Insurance Agency, LLC | Customer Relationships
Business Combination [Line Items]
Customer relationship intangible asset	$ 2,900
Intangible assets average useful life (in years)	10 years