LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Overview (Details) $ in Thousands, € in Millions		Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Debt Issuance Costs, Noncurrent, Net		$ 9,660		$ 12,947
Long-term debt		772,339		1,079,187
2021 Euro Loan [Member]
Debt Instrument [Line Items]
Principal Amount of Liability Component		240,834	€ 210.3
Debt Issuance Costs, Noncurrent, Net	[1]	538
Long-term debt		240,296		281,871
2023 Euro Loan [Member]
Debt Instrument [Line Items]
Principal Amount of Liability Component		536,776	€ 468.8
Debt Issuance Costs, Noncurrent, Net	[1]	4,733
Long-term debt		532,043		$ 556,771
2023 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal Amount of Liability Component		0
Debt Issuance Costs, Noncurrent, Net	[1]	0
Long-term debt		0
Senior Debt and Credit Facilities [Member]
Debt Instrument [Line Items]
Principal Amount of Liability Component		777,610
Debt Issuance Costs, Noncurrent, Net	[1]	5,271
Long-term debt		$ 772,339

[1] (1) Debt issuance costs related to the 2021 Euro Loan and 2023 Euro Loan are being amortized on a straight-line basis, which approximates the effective interest method, over the life of the respective instruments. Debt issuance costs related to the 2023 Revolving Credit Facility are classified as non-current assets in our consolidated balance sheet and are being amortized on a straight-line basis over the life of the 2023 Revolving Credit Facility.