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

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CORPORATE BORROWINGS - Indebtedness Outstanding Summary (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Nov. 16, 2021	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, gross	$ 236,450,000	$ 239,853,000
Unamortized loan fees	(6,115,000)	(6,454,000)
Total indebtedness outstanding, net	230,335,000	233,399,000
Less current maturities of long-term debt	(5,600,000)	(3,227,000)
Long-term debt	$ 224,735,000	230,172,000
Credit Agreement \| Revolver
Debt Instrument [Line Items]
Credit Agreement, interest rate	5.46%
Credit Agreement \| Revolver \| Revolving Credit Agreement, Due 2025
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	0
Credit Agreement, interest rate	5.46%
Convertible Debt \| Convertible Note 1.88% Due 2041
Debt Instrument [Line Items]
Long-term debt, gross	$ 201,250,000	201,250,000
Unamortized loan fees	$ (6,025,000)
Senior secured notes, stated interest rate	1.88%		1.88%
Secured Debt \| Note Purchase Agreement Due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 15,200,000	18,400,000
Senior secured notes, stated interest rate	3.53%			3.53%
Secured Debt \| Note Purchase Agreement Due 2029
Debt Instrument [Line Items]
Long-term debt, gross	$ 20,000,000	20,000,000
Senior secured notes, stated interest rate	3.80%
Other long-term borrowings
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 203,000