LONG-TERM DEBT - Senior Unsecured Debt (Details) - Senior Unsecured Debt - 7.250% senior unsecured notes, due November 1, 2024 - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2017
Debt Instrument [Line Items]
Stated interest rate (percent)	7.25%	7.25%
Debt, face amount	$ 400.0	$ 400.0
On or after November 1, 2020
Debt Instrument [Line Items]
Redemption of the principal amount	103.625%
On or after November 1, 2021
Debt Instrument [Line Items]
Redemption of the principal amount	101.813%
On or after November 1, 2022
Debt Instrument [Line Items]
Redemption of the principal amount	100.00%

Senior notes redeemed at a percentage of principal amount of debt.

No definition available.

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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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- Definition

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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