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Equity Incentive Plans (Summary Of Nonvested Share Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
May 06, 2025
Dec. 31, 2023
May 12, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Number of Shares, Outstanding at December 31, 2022     614,614        
Number of Shares, Granted     283,494        
Number of Shares, Vested     (265,675)        
Number of Shares, Outstanding at September 30, 2023 632,433   632,433        
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2022     $ 42.79        
Weighted Average Grant Date Fair Value, Granted     50.21        
Weighted Average Grant Date Fair Value, Vested     43.37        
Weighted Average Grant Date Fair Value, Outstanding at September 30, 2023 $ 45.87   $ 45.87        
Weighted Average Life Remaining, Outstanding at September 30, 2023 (in years)     1 year 3 months 25 days        
Fair value of non-vested shares     $ 11,800 $ 13,700      
Unamortized share-based compensation expense $ 15,000   15,000        
Severance Costs $ 0 $ 0 $ 0 1,836      
2016 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Common shares, options to purchase common shares and restricted share units, expected to granted (in shares)         5,950,000   3,950,000
Number of shares available for grant (in shares) 2,312,596   2,312,596        
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share-based Payment Arrangement, Expense     $ 3,900 3,400      
Severance Costs       700      
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, 2022     326,469        
Number of Shares, Granted     113,833        
Number of Shares, Vested     (98,610)        
Number of Shares, Outstanding at September 30, 2023 341,692   341,692        
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2022     $ 59.44        
Weighted Average Grant Date Fair Value, Granted     66.45        
Weighted Average Grant Date Fair Value, Vested     72.63        
Weighted Average Grant Date Fair Value, Outstanding at September 30, 2023 $ 57.97   $ 57.97        
Unamortized share-based compensation expense $ 9,300   $ 9,300        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum     4.20%        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     25.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     3 years        
Share-based Payment Arrangement, Expense     $ 2,800 2,900      
Severance Costs       900      
Performance Shares [Member] | Granted in 2024              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share-based Compensation, Performance Measure Percent, Peer TSR 52.20%   52.20%        
Share-based Compensation, Performance Measure Percent, MSCI US REIT Index TSR 26.10%   26.10%        
Share-based Compensation, Performance Measure Percent, Growth in AFFO per share 21.70%   21.70%        
Performance Shares [Member] | Granted in 2025              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share-based Compensation, Performance Measure Percent, Peer TSR 52.20%   52.20%        
Share-based Compensation, Performance Measure Percent, MSCI US REIT Index TSR 26.10%   26.10%        
Share-based Compensation, Performance Measure Percent, Growth in AFFO per share 21.70%   21.70%        
Performance Shares [Member] | Market Condition              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share Based Compensation Arrangement, Equity Instrument, Other Than Options, Market Condition, Grant Date Fair Value $ 6,300 $ 4,100 $ 6,300 $ 4,100      
Performance Shares [Member] | Market Condition | Granted in 2022              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     200.00%        
Performance Shares [Member] | Performance Condition | Granted in 2022              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Fair value of non-vested shares     $ 12,300        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     200.00%        
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period     197,220        
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 by Share-based Payment Award, Award Vesting Rights, Percentage     119.00%        
Share-based Compensation Arrangement, Equity Instruments Other Than Options, Performance Condition, Nonvested, Grant Date Fair Value           $ 1,500  
Dividend Equivalents | Performance Condition | Granted in 2022              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period     51,612