Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS (Details)

v3.7.0.1
RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Related Party Transaction [Line Items]    
Affiliate payroll service fees reimbursed by the Company $ 19,749 $ 13,277
Supervisory and Administrative Fee Agreement [Member] | Participating Regional Operator [Member] | Management [Member]    
Related Party Transaction [Line Items]    
Supervisory and administrative fees for PROs 3,300 2,200
Payroll Services [Member] | Participating Regional Operator [Member] | Management [Member]    
Related Party Transaction [Line Items]    
Affiliate payroll service fees reimbursed by the Company 5,800 4,000
Due Diligence Costs [Member] | Participating Regional Operator [Member] | Management [Member] | Acquisition Costs [Member]    
Related Party Transaction [Line Items]    
Due diligence expenses payable to the PROs 100 $ 100
Customary Fees [Member] | Joint Venture [Member] | Management Fees And Other Revenue [Member]    
Related Party Transaction [Line Items]    
Management fees and other revenue from Joint Venture $ 1,800  
Minimum [Member] | Supervisory and Administrative Fee Agreement [Member] | Participating Regional Operator [Member] | Management [Member]    
Related Party Transaction [Line Items]    
Supervisory and administrative fee agreement of gross revenue, percent 5.00%  
Maximum [Member] | Supervisory and Administrative Fee Agreement [Member] | Participating Regional Operator [Member] | Management [Member]    
Related Party Transaction [Line Items]    
Supervisory and administrative fee agreement of gross revenue, percent 6.00%