Corporate Borrowings - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 16, 2021	Dec. 31, 2023	Dec. 31, 2019	Dec. 31, 2017	Mar. 31, 2024	Aug. 23, 2023	May 14, 2021	Feb. 14, 2020
Debt Instrument [Line Items]
Total indebtedness outstanding		$ 293,850			$ 307,250
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Contingent increase in borrowing capacity							$ 100,000
Credit Agreement - Revolver, 6.43% (variable rate) due 2026
Debt Instrument [Line Items]
Outstanding borrowings under credit facility							400,000	$ 300,000
Credit Agreement - Revolver, 6.43% (variable rate) due 2026 | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings		105,000
Total indebtedness outstanding		63,000			78,000
Remaining borrowing capacity					322,000
Convertible Senior Notes, 1.88% (fixed rate) due 2041 | Convertible Debt
Debt Instrument [Line Items]
Total indebtedness outstanding		201,250			$ 201,250
Proceeds from issuance of debt	$ 201,250
Stated interest rate	1.88%				1.88%
Note Purchase Agreement | Secured Debt
Debt Instrument [Line Items]
Term loan face value							20,000
Note Purchase Agreement | Secured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Remaining borrowing capacity					$ 222,000
Term loan face value						$ 250,000	$ 105,000
Series A Senior Secured Notes, 3.53% (fixed rate) due 2027 | Secured Debt
Debt Instrument [Line Items]
Total indebtedness outstanding		12,000			$ 11,200
Proceeds from issuance of debt				$ 20,000
Stated interest rate					3.53%
Senior Secured Notes, 3.80% (fixed rate) due 2029 | Secured Debt
Debt Instrument [Line Items]
Total indebtedness outstanding		$ 17,600			$ 16,800
Proceeds from issuance of debt			$ 20,000
Stated interest rate					3.80%