Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Narrative) (Details)

v3.5.0.2
SUBSEQUENT EVENTS (Narrative) (Details) - Senior secured revolving credit facility
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 27, 2016
USD ($)
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Sep. 30, 2017
Oct. 26, 2016
USD ($)
Mar. 31, 2014
USD ($)
Subsequent Event [Line Items]                
Maximum borrowing amount               $ 300,000,000.0
Subsequent Event                
Subsequent Event [Line Items]                
Maximum borrowing amount $ 200,000,000           $ 300,000,000  
Maximum leverage ratio 5.00              
Impairment charges (up to) $ 20,000,000              
Asset coverage ratio 2.00              
Proceeds from asset sales and issuance and sale of equity $ 40,000,000              
Scenario, Forecast | Subsequent Event                
Subsequent Event [Line Items]                
Maximum leverage ratio     3.50 3.25 3.00      
Minimum interest coverage ratio   1.50       1.75