Business Combinations - Total Consideration Transferred and Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Feb. 01, 2025	Sep. 30, 2025	Dec. 31, 2024
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Goodwill		$ 375,237	$ 179,025
Heartland BancCorp
Consideration
Cash for Stock Options, 401K Shares and Fractional Shares	$ 23,102
Equity Instruments	320,007
Fair Value of Total Consideration Transferred	343,109
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Cash	6,216
Federal Funds Sold and Other Short-term Investments	39,550
Interest-bearing Time Deposits with Banks	0
Securities	220,358
Loans, Net	1,503,378
Stock in FHLB and Other Restricted Stock, at Cost	6,992
Premises, Furniture & Equipment	39,764
Other Real Estate	0
Intangible Assets	40,065
Company Owned Life Insurance	20,660
Accrued Interest Receivable and Other Assets	39,274
Deposits - Non-interest Bearing	(436,467)
Deposits - Interest Bearing	(1,294,696)
FHLB Advances and Other Borrowings	(29,342)
Accrued Interest Payable and Other Liabilities	(8,855)
Total Identifiable Net Assets	146,897
Goodwill	$ 196,212