Income Taxes (Components Of The Net Deferred Tax (Liabilities) Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets, Gross [Abstract]
Net unrealized losses on investment securities	$ 303,465	$ 140,227
Acquired loans	146,315	4,644
Allowance for credit losses	115,777	79,312
Accrued severance and deferred compensation	39,904	16,523
Operating lease liabilities	33,956	23,603
Other	54,181	35,459
Total gross deferred tax assets	693,598	299,768
Deferred Tax Liabilities, Gross [Abstract]
Other intangible assets	155,642	156
Direct financing leases	42,825	41,120
Deferred loan fees and costs	34,402	25,676
Residential mortgage servicing rights	31,259	49,681
Operating lease right-of-use asset	30,117	20,235
Premises and equipment	20,579	1,575
Fair market value adjustment on junior subordinated debentures	17,287	15,081
Other	14,284	13,421
Total gross deferred tax liabilities	346,395	166,945
Net deferred tax asset	$ 347,203	$ 132,823