v3.10.0.1
LONG-TERM DEBT LIABILITIES - Senior Debt (Details) - USD ($)
$ in Millions
Nov. 17, 2017
Dec. 31, 2018
Dec. 31, 2017
Nov. 01, 2016
Debt Instrument [Line Items]        
Weighted average interest rate under the senior debt   5.20% 4.20%  
New Credit Facility, Amount Outstanding       $ 540.0
Senior Debt Obligations        
Debt Instrument [Line Items]        
Consolidated Leverage Ratio   3.6    
Senior Debt Obligations | Through December 31, 2017 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Consolidated Leverage Ratio   4    
Senior Debt Obligations | ThroughDecember312018Member [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Consolidated Leverage Ratio   4.5    
Senior Debt Obligations | New Revolver [Member]        
Debt Instrument [Line Items]        
Undrawn amount of the Revolver   $ 64.1    
New Credit Facility, Amount Outstanding $ 250.0      
Senior Debt Obligations | New Term B Loan [Member]        
Debt Instrument [Line Items]        
DebtInstrumentAnnualPrincipalPayment 1.00%