Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Narrative (Details)

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Apr. 24, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notional amount     $ 100.0  
Unrealized gains forecasted to be included in earnings transferred from AOCI in the next twelve months $ (0.6)      
Level 2 | Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fixed rate mortgages, fair value disclosure $ 283.0     $ 276.5
Weighted average market interest rate (percent) 3.39% 4.17%    
Weighted average contractual interest rate (percent) 4.84% 4.85%    
Designated as Hedging Instrument | Interest Rate Swap        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notional amount $ 970.0     795.0
Weighted average remaining term 4 years 7 months 6 days      
Weighted average fixed rate (percent) 1.92%      
Reported Value Measurement        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fixed rate mortgages, fair value disclosure $ 265.6     $ 268.1