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Derivative Instruments and Hedging Activities - Components of Investment Fair Value Changes (Details) - Trading - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	$ (1,608)	$ (1,608)
Unrealized Gains (Losses)	15,892	12,985
Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(1,608)	(1,608)
Unrealized Gains (Losses)	(554)	(974)
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0
Unrealized Gains (Losses)	$ 16,446	$ 13,959

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No definition available.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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