NOTES PAYABLE, REVOLVING CREDIT FACILITY AND CAPITAL LEASES - Margin Spread Based on Leverage Ratio (Details) - Line of Credit - Revolving Credit Facility

NOTES PAYABLE, REVOLVING CREDIT FACILITY AND CAPITAL LEASES - Margin Spread Based on Leverage Ratio (Details) - Line of Credit - Revolving Credit Facility			1 Months Ended	12 Months Ended
	Aug. 22, 2017	Jul. 01, 2016	Sep. 30, 2017	Dec. 31, 2018
Eurodollar \| Amendment No. 5 First Lien Credit Agreement
Line of Credit Facility [Line Items]
Basis spread on variable rate				3.75%
Eurodollar \| Amendment No. 5 First Lien Credit Agreement \| 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	4.50%
Eurodollar \| Amendment No. 5 First Lien Credit Agreement \| 4.00x but ≤ 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.75%		3.75%
Eurodollar \| Amendment No. 5 First Lien Credit Agreement \| 3.50x but ≤ 4.00x
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.50%
Eurodollar \| Amendment No. 5 First Lien Credit Agreement \| ≤ 3.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.25%		3.25%
Eurodollar \| First Lien Credit Agreement \| 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		4.50%
Eurodollar \| First Lien Credit Agreement \| 4.00x but ≤ 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.75%
Eurodollar \| First Lien Credit Agreement \| 3.50x but ≤ 4.00x
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.50%
Eurodollar \| First Lien Credit Agreement \| ≤ 3.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.25%
Base Rate \| Amendment No. 5 First Lien Credit Agreement
Line of Credit Facility [Line Items]
Basis spread on variable rate				2.75%
Base Rate \| Amendment No. 5 First Lien Credit Agreement \| 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.50%
Base Rate \| Amendment No. 5 First Lien Credit Agreement \| 4.00x but ≤ 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%		2.75%
Base Rate \| Amendment No. 5 First Lien Credit Agreement \| 3.50x but ≤ 4.00x
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
Base Rate \| Amendment No. 5 First Lien Credit Agreement \| ≤ 3.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%		2.25%
Base Rate \| First Lien Credit Agreement \| 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.50%
Base Rate \| First Lien Credit Agreement \| 4.00x but ≤ 5.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.75%
Base Rate \| First Lien Credit Agreement \| 3.50x but ≤ 4.00x
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.50%
Base Rate \| First Lien Credit Agreement \| ≤ 3.50x
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.25%