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

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Amount of the cost of borrowed funds accounted for as interest expense.

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DEBT - Senior Notes (Details) - USD ($)		3 Months Ended		6 Months Ended
DEBT - Senior Notes (Details) - USD ($)	Sep. 26, 2017	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Interest expense		$ 6,034,000	$ 5,882,000	$ 12,184,000	$ 12,154,000
Senior Notes due 2025
Debt Instrument [Line Items]
Notes issued, aggregate principal amount	$ 325,000,000
Notes issued, interest rate	5.50%
Proceeds from issuance of senior long-term debt	$ 318,900,000
Interest expense		$ 4,500,000	$ 4,600,000	$ 9,000,000.0	$ 9,300,000