LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Leverage summary (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Interest on long-term debt and other financing arrangements		$ 4,934	$ 6,882	$ 10,708	$ 14,250
2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage	[1]	1.94%		1.94%
Euro Loans [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				2.4		2.4
Guarantee Fee [Member]
Debt Instrument [Line Items]
Interest on long-term debt and other financing arrangements		$ 2,800		$ 5,600	$ 7,300	$ 3,600
2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage	[2]	1.50%		1.50%
Net Leverage Greater Than 7.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		6.50%		6.50%
Net Leverage Greater Than 7.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				7.0
Net Leverage Greater Than 7.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		6.00%		6.00%
Net Leverage 7.0x - 6.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		5.50%		5.50%
Net Leverage 7.0x - 6.0x [Member] | Euro Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				6.0
Net Leverage 7.0x - 6.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				7.0
Net Leverage 7.0x - 6.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		5.00%		5.00%
Net Leverage 6.0x - 5.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		4.75%		4.75%
Net Leverage 6.0x - 5.0x [Member] | Euro Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				5.0
Net Leverage 6.0x - 5.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				6.0
Net Leverage 6.0x - 5.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		4.25%		4.25%
Net Leverage 5.0x - 4.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		4.25%		4.25%
Net Leverage 5.0x - 4.0x [Member] | Euro Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				4.0
Net Leverage 5.0x - 4.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				5.0
Net Leverage 5.0x - 4.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		3.75%		3.75%
Net Leverage 4.0x - 3.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		3.75%		3.75%
Net Leverage 4.0x - 3.0x [Member] | Euro Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				3.0
Net Leverage 4.0x - 3.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				4.0
Net Leverage 4.0x - 3.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		3.25%		3.25%
Net Leverage Less Than 3.0x [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		3.50%		3.50%
Net Leverage Less Than 3.0x [Member] | Euro Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Financial Covenant, Net Leverage				3.0
Net Leverage Less Than 3.0x [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Guarantee Fee, Stated Percentage		3.25%		3.25%

[1] .

[2] Effective until February 19, 2021. From February 19, 2021 through maturity on April 26, 2023, the rate fixed pursuant to interest rate hedges will increase to 0.97%, with a corresponding decrease in the Guarantee Fee rate, such that the all-in borrowing rate remains 3.50% if our net leverage ratio remains unchanged.