CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS - Debt validly tendered and accepted (Details) € in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Jul. 31, 2020
6.375% Senior Subordinated Notes due 2024
CORPORATE BORROWINGS AND CAPITAL AND FINANCING LEASE OBLIGATIONS
Aggregate principal amount	$ 632,145	€ 496,014
Percentage of Outstanding Existing Subordinated Notes Validly Tendered	99.20%
Stated interest rate (as a percent)	6.375%	6.375%	6.375%
5.75% Senior Subordinated Notes due 2025
CORPORATE BORROWINGS AND CAPITAL AND FINANCING LEASE OBLIGATIONS
Aggregate principal amount	$ 501,679
Percentage of Outstanding Existing Subordinated Notes Validly Tendered	83.61%
Stated interest rate (as a percent)	5.75%	5.75%	5.75%
5.875% Senior Subordinated Notes due 2026
CORPORATE BORROWINGS AND CAPITAL AND FINANCING LEASE OBLIGATIONS
Aggregate principal amount	$ 539,393
Percentage of Outstanding Existing Subordinated Notes Validly Tendered	90.65%
Stated interest rate (as a percent)	5.875%	5.875%	5.875%
6.125% Senior Subordinated Notes due 2027
CORPORATE BORROWINGS AND CAPITAL AND FINANCING LEASE OBLIGATIONS
Aggregate principal amount	$ 344,279
Percentage of Outstanding Existing Subordinated Notes Validly Tendered	72.48%
Stated interest rate (as a percent)	6.125%	6.125%	6.125%

Percentage of outstanding existing subordinated notes validly tendered.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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