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Income Taxes (Reconciliation to Effective Rate) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
Federal at statutory income tax rates $ 241,413    
State income taxes, net of federal benefit (1) 47,832    
Tax credits:      
General business credits (9,914)    
Changes in unrecognized tax benefits 9,717    
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount [Abstract]      
Share-based payment awards (4,163)    
Other 1,598    
Provision for income taxes $ 286,483 $ 334,276 $ 378,525
%      
Federal at statutory income tax rates 21.00% 21.00% 21.00%
State income taxes, net of federal benefit (1) 4.20% 4.20% 5.00%
Tax credits:      
General business credits (0.90%)    
Changes in unrecognized tax benefits 0.80%    
Nontaxable or nondeductible items:      
Share-based payment awards (0.40%) (0.80%) (0.20%)
Other 0.20%    
Non-deductible expenses   0.20% 0.90%
Federal research and development credits   (0.70%) (0.60%)
Other   0.10% 0.10%
Effective income tax rate 24.90% 24.00% 26.20%
Tax Jurisdiction of Domicile [Extensible Enumeration] UNITED STATES