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DEBT - Narrative (Details)
12 Months Ended
Apr. 21, 2015
USD ($)
Dec. 31, 2016
USD ($)
Property
Jan. 15, 2016
USD ($)
Dec. 31, 2015
USD ($)
Apr. 07, 2015
USD ($)
Sep. 05, 2013
USD ($)
Debt Instrument [Line Items]            
Weighted average interest rate for all borrowings (as a percent)   3.69%   3.90%    
Debt instrument, collateral, number of real estate properties | Property   46        
Term Loan $150 Million            
Debt Instrument [Line Items]            
Fixed interest rate (as a percent)   3.49%        
Unsecured debt | Senior unsecured credit facility $450 Million            
Debt Instrument [Line Items]            
Loan amount   $ 450,000,000        
Maximum borrowing capacity   450,000,000.0 $ 450,000,000.0      
Line of credit outstanding   200,000,000.0        
Amount available for borrowing   250,000,000.0        
Maximum increase in borrowing capacity available through accordion feature option   $ 150,000,000.0        
Unsecured debt | Senior unsecured credit facility $300 Million            
Debt Instrument [Line Items]            
Loan amount       $ 300,000,000.0    
Maximum borrowing capacity       300,000,000.0    
Line of credit outstanding       170,000,000    
Amount available for borrowing       130,000,000    
Unsecured debt | Term Loan $150 Million            
Debt Instrument [Line Items]            
Loan amount     150,000,000.0      
Unsecured debt | 2015 Term Loan            
Debt Instrument [Line Items]            
Loan amount         $ 125,000,000.0  
Amount drawn $ 15,000,000          
Maximum increase in borrowing capacity available through accordion feature option         $ 75,000,000  
Accordion feature increase to total commitment $ 15,000,000          
Effective interest rate (as a percent)   2.57%        
Unsecured debt | Revolving credit facility $300 Million            
Debt Instrument [Line Items]            
Loan amount     $ 300,000,000.0      
Unsecured debt | Revolving credit facility $225 Million            
Debt Instrument [Line Items]            
Loan amount       225,000,000    
Unsecured debt | Term Loan $75 Million            
Debt Instrument [Line Items]            
Loan amount       75,000,000.0    
Revolving credit facility            
Debt Instrument [Line Items]            
Effective interest rate (as a percent)   2.27%        
Revolving credit facility | Unsecured debt | Senior unsecured credit facility $450 Million            
Debt Instrument [Line Items]            
Effective interest rate (as a percent)   2.27%        
Option One | Revolving credit facility | LIBOR | Minimum            
Debt Instrument [Line Items]            
Interest rate margin on variable rate basis (as a percent)   1.50%        
Option One | Revolving credit facility | LIBOR | Maximum            
Debt Instrument [Line Items]            
Interest rate margin on variable rate basis (as a percent)   2.25%        
Option Two | Revolving credit facility | Minimum            
Debt Instrument [Line Items]            
Debt instrument, base rate margin   0.50%        
Option Two | Revolving credit facility | Maximum            
Debt Instrument [Line Items]            
Debt instrument, base rate margin   1.25%        
Option Two | Revolving credit facility | LIBOR            
Debt Instrument [Line Items]            
Interest rate margin on variable rate basis (as a percent)   1.00%        
Option Two | Revolving credit facility | Federal funds rate            
Debt Instrument [Line Items]            
Interest rate margin on variable rate basis (as a percent)   0.50%        
Interest rate swaps | Designated as hedges            
Debt Instrument [Line Items]            
Notional value of derivative   $ 75,000,000   $ 75,000,000    
Cash flow hedges | Interest rate swaps | Designated as hedges            
Debt Instrument [Line Items]            
Notional value of derivative           $ 75,000,000.0
Fixed interest rate (as a percent)   2.04%