SIGNIFICANT ACCOUNTING POLICIES (Details - Fair Value Measurements) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
First Lien Term Loans and SunTrust Term Loan	$ 774,125	$ 662,403
Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
First Lien Term Loans and SunTrust Term Loan	772,313	661,640
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
First Lien Term Loans and SunTrust Term Loan	0	0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
First Lien Term Loans and SunTrust Term Loan	772,313	661,640
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
First Lien Term Loans and SunTrust Term Loan	0	0
2019 Swaps - Interest Rate Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts	26,709	37,989
2019 Swaps - Interest Rate Contracts | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts	0	0
2019 Swaps - Interest Rate Contracts | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts	26,709	37,989
2019 Swaps - Interest Rate Contracts | Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts	$ 0	$ 0