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Borrowings - Components of Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt	$ 200,000	$ 200,000
Debt issuance costs	(866)	(950)
Total borrowings	199,134	199,050
Senior notes | Series D
Debt Instrument [Line Items]
Long-term debt	$ 60,000
Interest Rate Per Annum	4.29%
Senior notes | Series E
Debt Instrument [Line Items]
Long-term debt	$ 50,000
Interest Rate Per Annum	4.53%
Senior notes | Series F
Debt Instrument [Line Items]
Long-term debt	$ 90,000
Interest Rate Per Annum	3.10%
Revolving credit agreement
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 0

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