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Stock Compensation and Other Benefit Plans for ROIC - Narrative (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
Apr. 25, 2018
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense | $ $ 11,000 $ 8,900 $ 8,600  
Employer discretionary contribution amount | $ $ 95 89 87  
Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized       22,500,000
Fungible Unit to full value award conversion ratio       6.25
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 638,728      
Granted (in dollars per share) | $ / shares $ 16.38      
Compensation cost not yet recognized | $ $ 10,900      
Compensation cost not yet recognized, period for recognition (in years) 1 year 8 months 12 days      
Vested in period, fair value | $ $ 5,500 $ 6,600 $ 5,800  
Unvested 1,153,471 1,048,770    
Weighted average grant date fair value (in dollars per share) | $ / shares $ 16.77 $ 16.39    
Performance-based restricted stock | Vesting on January 1, 2024        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 201,726      
LTIP Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value (in dollars per share) | $ / shares $ 16.27      
LTIP Units | Vesting on January 1, 2022        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unvested 187,279