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SHARE-BASED COMPENSATION (Details)
1 Months Ended 12 Months Ended
Feb. 29, 2016
installment
Mar. 31, 2015
$ / shares
shares
Dec. 31, 2015
USD ($)
plan
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2013
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of share-based compensation plans | plan     2    
Number of shares authorized | shares     10,400,000    
Award vesting period (years)     5 years    
Share-based compensation expense | $     $ 4,287,000 $ 3,442,000 $ 2,682,000
Share-based compensation cost capitalized as part of real estate assets | $     274,000 268,000 202,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Unrecognized compensation cost related to nonvested stock awards | $     $ 7,927,000    
Compensation cost to be recognized over a weighted average period     3 years 2 months    
Defined contribution plan, age of eligibility (years)     21 years    
Vested at conclusion of performance period          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Vesting percentage   60.00%      
Remaining percentage after performance period          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Vesting percentage   40.00%      
Vested each year for the first two anniversaries after conclusion of performance period          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Vesting percentage   20.00%      
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total intrinsic value | $       $ 0 $ 0
Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Nonvested, beginning of period (in shares) | shares     498,862    
Granted (in shares) | shares     267,410    
Vested (in shares) | shares     (220,568)    
Forfeited (in shares) | shares     (12,300)    
Nonvested, end of period (in shares) | shares     533,404 498,862  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Weighted average grant-date fair value, nonvested, beginning of period (in dollars per share) | $ / shares     $ 18.35    
Weighted average grant-date fair value, granted (in dollars per share) | $ / shares     20.30 $ 17.11 $ 20.17
Weighted average grant-date fair value, vested (in dollars per share) | $ / shares     18.62    
Weighted average grant-date fair value, forfeited (in dollars per share) | $ / shares     19.41    
Weighted average grant-date fair value, nonvested, ending of period (in dollars per share) | $ / shares     $ 19.19 $ 18.35  
Total fair value of shares vested | $     $ 4,298,000 $ 3,484,000 $ 4,305,000
Performance Shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense | $     624,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Granted (in shares) | shares   138,680      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]          
Weighted average grant-date fair value, granted (in dollars per share) | $ / shares   $ 15.52      
Unrecognized compensation cost related to nonvested stock awards | $     $ 1,528,000    
Service period (in years)     3 years    
Restricted Common Stock | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of installments, at the end of award period | installment 5