Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Other Commitments [Line Items]
Lending Related Commitments, Fair Value	$ 0	$ 0
Loans Repurchased Under Make Whole Requests	2,200	3,500
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	39,276	41,276
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	11,847,950	11,872,816
Letter of Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	2,047	425
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Lending Related Commitments	241,240	222,047
Lines of Credit, Fair Value Disclosure	$ 2,400	$ 2,200