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SHARE BASED COMPENSATION, 401(K) PLAN AND DEFERRED COMPENSATION - Narrative (Details)
12 Months Ended
Mar. 05, 2020
installment
shares
Feb. 21, 2019
Feb. 01, 2019
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
May 20, 2020
shares
Jan. 22, 2019
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based Compensation arrangement by share-based payment award, options, outstanding, number | shares       300,046 334,561      
Defined contribution plan, maximum annual contribution per employee, percent       100.00%        
Defined contribution plan, employer discretionary contribution amount | $       $ 500,000 $ 400,000 $ 500,000    
Threshold age for qualifying retirement       57        
Number of vesting installments | installment 3              
Number of shares to be issued under deferred compensation plan included in total shares outstanding | shares       1,200,000 1,100,000      
Restricted Share Rights Awards                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted share rights outstanding (in shares) | shares       488,735 479,144      
Unrecognized compensation expenses | $       $ 1,800,000        
Weighted average period over which options will be recognized       9 months 18 days        
Share-based compensation expense | $       $ 4,300,000 $ 3,900,000 3,600,000    
Share-based compensation expense, capitalized | $       $ 400,000 300,000 600,000    
Granted (in shares) | shares 183,758     295,049        
Number of restricted share right will get settled for common share | shares 1              
Accumulated service period for voluntary termination 15 years              
Restricted Share Rights Awards | Minimum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting period       1 year        
Restricted Share Rights Awards | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting period 3 years     3 years        
Restricted Performance Share Units Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Vesting period     3 years          
Unrecognized compensation expenses | $       $ 4,500,000        
Weighted average period over which options will be recognized       1 year 6 months        
Share-based compensation expense | $       $ 3,000,000.0 4,200,000 3,900,000    
Share-based compensation expense, capitalized | $       $ 400,000 $ 600,000 1,100,000    
Common shares issued for share based compensation | shares     121,897          
Dividends payable, amount per share (in usd per share) | $ / shares               $ 0.19
Restricted Performance Share Units Plan | Executive Officers                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted share rights outstanding (in shares) | shares       715,965 396,365      
Granted (in shares) | shares       319,600        
Performance earning potential   200.00%            
Outperformance feature measurement term   3 years   3 years        
Restricted Performance Share Units Plan | Executive Officers | 2020 Awards                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense | $       $ 0        
Awards issuable under outperformance feature (in shares) | shares       316,306        
Restricted Performance Share Units Plan | Executive Officers | 2019 Awards                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense | $       $ 200,000        
Awards issuable under outperformance feature (in shares) | shares       233,890        
Restricted Performance Share Units Plan | Non-Officer Employees                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted share rights outstanding (in shares) | shares 40,920           70,371  
Employee Share Purchase Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense | $       $ 100,000 $ 100,000 100,000    
Share-based compensation, percentage of closing price       85.00%        
Maximum participant contribution, percentage of compensation       20.00%        
Maximum participant contribution, dollar amount | $       $ 50,000        
Aggregate share-based awards awarded to executives | shares       1,250,000        
Stock issued during period, value, employee stock purchase plan | $       $ 400,000 $ 500,000 $ 500,000    
Share-based compensation arrangement by share-based payment award, discount from market price, purchase       15.00%