LONG-TERM OBLIGATIONS - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal amount	$ 278.1	$ 10.9
Deferred debt issuance costs	(4.0)	(3.5)
Long-term obligations, including current portion	274.1	7.4
Current portion of long-term obligations	(7.6)	(1.6)
Long-term obligations, less current portion	266.5	5.8
Term Loan [Member] \| One Hundred Seventy Five Million Term Loan Facility [Member]
Debt Instrument [Line Items]
Principal amount	173.9	0.0
Revolving Credit Facility [Member] \| 550 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	100.0	7.5
Promissory Notes [Member]
Debt Instrument [Line Items]
Principal amount	0.9	1.1
Finance leases [Member]
Debt Instrument [Line Items]
Principal amount	$ 3.3	$ 2.3

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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