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SHARE INCENTIVE PLAN Schedule of Unvested Shares and LTIP Units (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Total unrecognized compensation cost related to nonvested awards $ 17.0    
Weighted-average period over which cost is expected to be recognized 2 years 4 months 24 days    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Shares unvested, Beginning of period (in shares) 55,018 63,737  
Shares granted (in shares) 22,819 28,563  
Shares vested (in shares) (24,744) (34,598)  
Shares forfeited (in shares) (3,194) (2,684)  
Shares unvested, End of period (in shares) 49,899 55,018 63,737
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares unvested, Weighted average grant date fair value, Beginning of period (in dollars per share) $ 25.90 $ 23.34  
Shares granted, Weighted average grant date fair value (in dollars per share) 32.78 27.18  
Shares vested, Weighted average grant date fair value (in dollars per share) 25.44 23.40  
Shares forfeited, Weighted average grant date fair value (in dollars per share) 26.25 23.54  
Shares unvested, Weighted average grant date fair value, End of period(in dollars per share) $ 25.90 $ 25.90 $ 23.34
Total fair value of shares that vested $ 0.6 $ 0.8 $ 0.5
LTIP Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Shares unvested, Beginning of period (in shares) 1,061,924 884,334  
Shares granted (in shares) 258,464 441,946  
Shares vested (in shares) (292,544) (263,556)  
Shares forfeited (in shares) (7,723) (800)  
Shares unvested, End of period (in shares) 1,020,121 1,061,924 884,334
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares unvested, Weighted average grant date fair value, Beginning of period (in dollars per share) $ 23.92 $ 21.62  
Shares granted, Weighted average grant date fair value (in dollars per share) 34.00 26.24  
Shares vested, Weighted average grant date fair value (in dollars per share) 22.82 20.23  
Shares forfeited, Weighted average grant date fair value (in dollars per share) 25.90 24.66  
Shares unvested, Weighted average grant date fair value, End of period(in dollars per share) $ 23.92 $ 23.92 $ 21.62
Total fair value of shares that vested $ 6.7 $ 5.3 $ 6.8