DEBT (Schedule of Long Term Debt) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 975,000,000
Less: Deferred financing costs	(2,152,000)
Long-term debt, net of deferred financing costs	972,848,000	$ 972,567,000
Term Credit Agreement borrowings due 2024 at a variable interest rate of 4.1% at June 30, 2019
Debt Instrument [Line Items]
Total debt	$ 350,000,000
Effective interest rate	4.10%
Debt instrument, interest rate during period	3.30%
Term Credit Agreement borrowings due 2024 at a variable interest rate of 4.1% at June 30, 2019 | LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.625%
Senior Notes due 2022 at a fixed interest rate of 3.75%
Debt Instrument [Line Items]
Total debt	$ 325,000,000
Fixed interest rate	3.75%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 4.3% at June 30, 2019
Debt Instrument [Line Items]
Total debt	$ 300,000,000
Effective interest rate	4.30%
Debt instrument, interest rate during period	2.80%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 4.3% at June 30, 2019 | LIBOR
Debt Instrument [Line Items]
Basis points on periodic interest rate	1.90%