Business Combinations - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 01, 2025	Sep. 30, 2026	Dec. 31, 2025	Jul. 11, 2025
Assets:
Goodwill		$ 1,045,014	$ 1,034,735
Villages Bancorporation, Inc.
Assets:
Cash and cash equivalents	$ 166,758
Investment securities	2,540,392
Measurement Period Adjustments, , Investment securities	(42)
Loans	1,193,338
Measurement Period Adjustments, Loans	(9,051)
Bank premises and equipment	45,942
CDI	110,548
Goodwill	287,506
Measurement Period Adjustments, Goodwill	7,419
Other assets	99,776
Total Assets	4,444,260
Measurement Period Adjustments, Total Assets	(1,674)
Liabilities:
Deposits	3,450,869
Securities sold under agreements to repurchase	105,064
Other liabilities	59,182
Measurement Period Adjustments, Other Liabilities	(1,674)
Total Liabilities	3,615,115
Measurement Period Adjustments, Total Liabilities	(1,674)
Villages Bancorporation, Inc. | Initially Measured
Assets:
Cash and cash equivalents	166,758
Investment securities	2,540,434
Loans	1,202,389
Bank premises and equipment	45,942
CDI	110,548
Goodwill	280,087
Other assets	99,776
Total Assets	4,445,934
Liabilities:
Deposits	3,450,869
Securities sold under agreements to repurchase	105,064
Other liabilities	60,856
Total Liabilities	$ 3,616,789
Heartland Bancshares, Inc
Assets:
Cash and cash equivalents				$ 242,672
Investment securities				357,905
Loans				153,294
Bank premises and equipment				7,926
CDI				20,922
Goodwill				22,228
Other assets				18,590
Total Assets				823,537
Liabilities:
Deposits				705,195
Other liabilities				7,118
Total Liabilities				$ 712,313