Mergers and Acquisitions - Summary of Amounts Recognized for Major Class of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Feb. 28, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Fair value of liabilities assumed
Goodwill		$ 1,600,000		$ 1,100,000
Premier Financial Corporation [Member]
Business Combination [Line Items]
Total merger consideration	$ 1,007,983
Fair value of assets acquired
Cash and due from banks	200,592
Equity securities	14,601
Available-for-sale debt securities	1,149,980
Loans held for sale	170,952
Net portfolio loans	5,888,966
Premises and equipment	59,046
Accrued interest receivable	33,804
Intangible assets	158,406
Bank-owned life insurance	186,736
Deferred taxes	97,814
Other assets	132,337
Total assets acquired	8,093,234
Fair value of liabilities assumed
Deposits	6,873,447
FHLB borrowings	502,028
Subordinated debt and junior subordinated debt	80,606
Accrued interest payable	3,620
Other liabilities	101,725
Total liabilities assumed	7,561,426
Net assets acquired	531,808
Goodwill	$ 476,175	$ 476,175	$ 483,397