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LONG-TERM DEBT - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2019
2018 Term Loan A | Notes Payable
Debt Instrument [Line Items]
New term loan		$ 425,000,000
2018 Term Loan A | Notes Payable | LIBOR
Debt Instrument [Line Items]
Spread on variable rate	1.625%
2018 Term Loan A | Notes Payable | Prime lending rate
Debt Instrument [Line Items]
Spread on variable rate	0.625%
2018 Revolver | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility amount	$ 250,000,000
Letters of credit outstanding	16,000,000
Revolving credit facility remaining capacity	234,000,000
2018 Revolver | Swingline loan | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility amount	$ 20,000,000

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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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
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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