v3.25.2
Fair Value Measurements (Summary Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value Measurements [Line Items]    
Residential mortgage loans held for sale $ 3,488 $ 2,981
U.S. government and federal agency obligations 2,597,737 2,555,252
Government-sponsored enterprise obligations 44,148 42,849
State and municipal obligations 714,958 742,891
Agency mortgage-backed securities 3,356,039 3,444,891
Non-agency mortgage-backed securities 499,996 568,689
Asset-backed securities 1,496,323 1,557,015
Other debt securities 206,578 225,266
Trading debt securities 46,630 38,034
Equity securities 45,098 48,359
Private equity investments 174,070 184,386
Derivative Asset [1] 74,222 62,648
Assets held in trust for deferred compensation plan 22,456 21,849
Total assets 9,281,743 9,495,110
Derivative Liabilities [1] 23,277 26,963
Liabilities held in trust for deferred compensation plan 22,456 21,849
Total Liabilities 45,733 48,812
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value Measurements [Line Items]    
Residential mortgage loans held for sale 0 0
U.S. government and federal agency obligations 2,597,737 2,555,252
Government-sponsored enterprise obligations 0 0
State and municipal obligations 0 0
Agency mortgage-backed securities 0 0
Non-agency mortgage-backed securities 0 0
Asset-backed securities 0 0
Other debt securities 0 0
Trading debt securities 12,941 10,219
Equity securities 45,098 48,359
Private equity investments 0 0
Derivative Asset [1] 0 0
Assets held in trust for deferred compensation plan 22,456 21,849
Total assets 2,678,232 2,635,679
Derivative Liabilities [1] 0 0
Liabilities held in trust for deferred compensation plan 22,456 21,849
Total Liabilities 22,456 21,849
Significant Other Observable Inputs (Level 2)    
Fair Value Measurements [Line Items]    
Residential mortgage loans held for sale 3,488 2,981
U.S. government and federal agency obligations 0 0
Government-sponsored enterprise obligations 44,148 42,849
State and municipal obligations 714,008 741,927
Agency mortgage-backed securities 3,356,039 3,444,891
Non-agency mortgage-backed securities 499,996 568,689
Asset-backed securities 1,496,323 1,557,015
Other debt securities 206,578 225,266
Trading debt securities 33,689 27,815
Equity securities 0 0
Private equity investments 0 0
Derivative Asset [1] 73,882 62,555
Assets held in trust for deferred compensation plan 0 0
Total assets 6,428,151 6,673,988
Derivative Liabilities [1] 23,150 26,905
Liabilities held in trust for deferred compensation plan 0 0
Total Liabilities 23,150 26,905
Significant Unobservable Inputs (Level 3)    
Fair Value Measurements [Line Items]    
Residential mortgage loans held for sale 0 0
U.S. government and federal agency obligations 0 0
Government-sponsored enterprise obligations 0 0
State and municipal obligations 950 964
Agency mortgage-backed securities 0 0
Non-agency mortgage-backed securities 0 0
Asset-backed securities 0 0
Other debt securities 0 0
Trading debt securities 0 0
Equity securities 0 0
Private equity investments 174,070 184,386
Derivative Asset [1] 340 93
Assets held in trust for deferred compensation plan 0 0
Total assets 175,360 185,443
Derivative Liabilities [1] 127 58
Liabilities held in trust for deferred compensation plan 0 0
Total Liabilities $ 127 $ 58
[1]
* The fair value of each class of derivative is shown in Note 11.