LONG-TERM OBLIGATIONS - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Principal amount	$ 406.5	$ 245.7
Deferred debt issuance costs	(3.1)	(3.5)
Long-term obligations, including current portion	403.4	242.2
Current portion of long-term obligations	(10.7)	(9.9)
Long-term obligations, less current portion	392.7	232.3
Term Loan [Member] \| One Hundred Seventy Five Million Term Loan Facility [Member]
Debt Instrument [Line Items]
Principal amount	168.4	171.7
Revolving Credit Facility [Member] \| 550 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	235.0	70.0
Promissory Notes [Member]
Debt Instrument [Line Items]
Principal amount	0.2	0.6
Finance leases [Member]
Debt Instrument [Line Items]
Principal amount	$ 2.9	$ 3.4

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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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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