CREDIT FACILITY, NOTES PAYABLE AND CAPITAL LEASE OBLIGATIONS (Details Narrative)							35 Months Ended
	Apr. 18, 2019 USD ($)	Aug. 31, 2018 USD ($)	Aug. 22, 2017 USD ($)	Feb. 02, 2017 USD ($)	Jul. 01, 2016 USD ($)	Sep. 30, 2015 USD ($)	Aug. 31, 2018 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 137,500,000
Deferred financing costs, net of accumulated amortization								1,700,000	$ 1,400,000
Total credit facilities outstanding								0
Covenant, leverage ratio			4.00
First Lien Term Loans
Debt Instrument [Line Items]
Discounts on term loans								14,500,000
Term Loan
Debt Instrument [Line Items]
Debt instrument face value								716,522,000
Amendment No. 6 to Credit Agreement
Debt Instrument [Line Items]
Deferred financing costs, net of accumulated amortization	$ 683,000
Debt issuance costs	4,400,000
Debt discount	2,100,000
Amortization of deferred issuance costs	1,600,000
Amendment No. 5 to Credit Agreement
Debt Instrument [Line Items]
Deferred financing costs, net of accumulated amortization			$ 350,000
Debt issuance costs			4,700,000
Debt discount			4,100,000
Amortization of deferred issuance costs			235,000
Proceeds from term loans			170,000,000.0
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								131,700,000
Deferred financing costs, net of accumulated amortization								1,700,000
Total credit facilities outstanding								0	$ 28,000,000
Letters of credit outstanding								$ 5,900,000
Effective interest rate								7.50%
SunTrust | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 30,000,000
First Lien Credit Agreement, Fifth Amendment | Term Loan
Debt Instrument [Line Items]
Covenant, increase to credit facility			100,000,000.0
First Lien Credit Agreement, Fifth Amendment | Medium-term Notes
Debt Instrument [Line Items]
Total credit facilities outstanding			100,000,000.0
First Lien Credit Agreement, Fifth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Periodic payment, principal	9,700,000		$ 8,300,000
First Lien Credit Agreement, Sixth Amendment | Medium-term Notes
Debt Instrument [Line Items]
Total credit facilities outstanding	679,000,000
First Lien Credit Agreement, Sixth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	137,500,000.0
Line of credit facility, increase borrowing capacity	$ 20,000,000.0
First Lien Credit Agreement, Fourth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Periodic payment, principal				$ 6,100,000
First Lien Credit Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 117,500,000.0
Commitment fee percentage					0.25%
Unused capacity, commitment fee percentage					0.50%
Restated Agreement
Debt Instrument [Line Items]
Increase (decrease) in line of credit, net							$ 48,100,000
Restated Agreement | Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 60,000,000.0					60,000,000.0
Debt instrument face value								$ 57,000,000
Increase (decrease) in line of credit, net							28,100,000
Debt instrument, periodic payment		$ 750,000
Periodic payment, percent		5.00%
Periodic payment amortization increase		$ 375,000					375,000
Restated Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 30,000,000.0					30,000,000.0
Commitment fee percentage		2.75%
Unused capacity, commitment fee percentage		0.45%
Increase (decrease) in line of credit, net							20,000,000.0
Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 50,000,000.0
Agreement | Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 40,000,000.0					$ 40,000,000.0
Debt instrument, periodic payment		$ 500,000
Periodic payment, percent		5.00%
Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 10,000,000.0
Commitment fee percentage						3.00%
Unused capacity, commitment fee percentage						0.45%
Eurodollar | First Lien Credit Agreement, Sixth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Effective interest rate								2.33%
Eurodollar | Restated Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate		2.75%
Eurodollar | Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate						3.00%
Eurodollar | 3.50x but ≤ 4.00x | First Lien Credit Agreement, Sixth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Eurodollar | 3.50x but ≤ 4.00x | First Lien Credit Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate					3.50%
Base Rate | First Lien Credit Agreement, Sixth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Effective interest rate								5.00%
Base Rate | Restated Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Base Rate | Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate						2.00%
Base Rate | 3.50x but ≤ 4.00x | First Lien Credit Agreement, Sixth Amendment | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Base Rate | 3.50x but ≤ 4.00x | First Lien Credit Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate					2.50%