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FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring and Nonrecurring (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Valuation of financial instruments    
Derivative Asset $ 19,585  
Derivative Liability $ 1,552  
LIBOR | Minimum    
Valuation of financial instruments    
Derivative, Basis Spread on Variable Rate 1.50%  
LIBOR | Maximum    
Valuation of financial instruments    
Derivative, Basis Spread on Variable Rate 1.75%  
Interest rate swap | LIBOR    
Valuation of financial instruments    
Derivative, Basis Spread on Variable Rate 2.00%  
Fair Value, Measurements, Nonrecurring    
Valuation of financial instruments    
Assets held for sale $ 30,195 $ 16,999
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)    
Valuation of financial instruments    
Assets held for sale 30,195 $ 16,999
Fair Value, Measurements, Recurring | Interest rate swap    
Valuation of financial instruments    
Derivative Asset 19,585  
Derivative Liability 1,552  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap    
Valuation of financial instruments    
Derivative Asset 19,585  
Derivative Liability $ 1,552