v3.26.1
Equity Incentive Plans (Summary Of Restricted Share Unit Activity) (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Number of Shares, Outstanding at December 31, 2025 648,878    
Number of Shares, Granted 336,422    
Number of Shares, Vested (331,954)    
Number of Shares, Outstanding at March 31, 2026 650,338    
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2025 $ 46.05    
Weighted Average Grant Date Fair Value, Granted 54.68    
Weighted Average Grant Date Fair Value, Vested $ 45.24    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (3,008)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 42.52    
Weighted Average Life Remaining, Outstanding at March 31, 2026 (in years) 1 year 4 months 9 days    
Weighted Average Grant Date Fair Value, Outstanding at March 31, 2026 $ 50.95    
Unamortized share-based compensation expense $ 17.3    
Restricted Share Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Number of Shares, Outstanding at December 31, 2025 42,071    
Number of Shares, Granted 40,741    
Number of Shares, Vested (42,071)    
Number of Shares, Outstanding at March 31, 2026 40,741    
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2025 $ 56.01    
Weighted Average Grant Date Fair Value, Granted 56.20    
Weighted Average Grant Date Fair Value, Vested $ 56.01    
Weighted Average Life Remaining, Outstanding at March 31, 2026 (in years) 11 months 1 day    
Weighted Average Grant Date Fair Value, Outstanding at March 31, 2026 $ 56.20    
Unamortized share-based compensation expense $ 2.1    
Restricted Share Units [Member] | Non-Employee Trustees [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Share-based Payment Arrangement, Expense $ 1.2 $ 1.1  
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Number of Shares, Outstanding at December 31, 2025 341,692    
Number of Shares, Granted 119,459    
Number of Shares, Vested (111,593)    
Number of Shares, Outstanding at March 31, 2026 349,558    
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2025 $ 57.97    
Weighted Average Grant Date Fair Value, Granted 56.19    
Weighted Average Grant Date Fair Value, Vested $ 63.08    
Weighted Average Life Remaining, Outstanding at March 31, 2026 (in years) 1 year 6 months    
Weighted Average Grant Date Fair Value, Outstanding at March 31, 2026 $ 55.73    
Unamortized share-based compensation expense $ 10.2    
Share-based Payment Arrangement, Expense $ 3.0 $ 2.8  
Performance Shares [Member] | Performance Condition | Granted in 2026      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Share-based Compensation Arrangement, Equity Instruments Other Than Options, Performance Condition, Nonvested, Grant Date Fair Value     $ 2.1
Performance Shares [Member] | Performance Condition | Granted in 2025      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Share-based Compensation Arrangement, Equity Instruments Other Than Options, Performance Condition, Nonvested, Grant Date Fair Value     $ 2.1