Derivative Instruments - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash collateral received	$ 2,900	$ 400
Return of cash collateral into brokerage accounts	5,600	6,400
Losses on equity options activity	0	11,900
Exchange-traded options | Long exchange-traded options
Derivative [Line Items]
Cash collateral received	0	0
Long exchange-trade equity options at fair value	1,900	7,500
Exchange-traded options | Short exchange-traded options
Derivative [Line Items]
Return of cash collateral into brokerage accounts	0	0
Short exchange-traded equity options at fair value	$ 2,800	$ 12,500