Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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DEBT - Schedule of Long-Term Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Apr. 30, 2016	Mar. 31, 2012
Debt Instrument [Line Items]
Debt, carrying amount	$ 1,057,000,000	$ 975,000,000
Less: Current maturities of long-term debt	(82,000,000)	0
Less: Deferred financing costs	(1,871,000)	(2,433,000)
Long-term debt, net of deferred financing costs	973,129,000	972,567,000
Term Credit Agreement due 2024 at a variable interest rate of 3.3% at December 31, 2019
Debt Instrument [Line Items]
Debt, carrying amount	$ 350,000,000	350,000,000
Fixed interest rate	3.30%
Senior Notes due 2022 at a fixed interest rate of 3.75%
Debt Instrument [Line Items]
Debt, carrying amount	$ 325,000,000	325,000,000
Fixed interest rate	3.75%			3.75%
Incremental Term Loan Agreement due 2026 at a variable interest rate of 3.6% at December 31, 2019
Debt Instrument [Line Items]
Debt, carrying amount	$ 300,000,000	300,000,000	$ 300,000,000
Fixed interest rate	3.60%
Revolving Credit Facility due 2020 at a variable interest rate of 3.0% at December 31, 2019
Debt Instrument [Line Items]
Debt, carrying amount	$ 82,000,000	$ 0
Fixed interest rate	3.00%