Summary of Significant Accounting Policies - Additional Information (Details)		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 01, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounting Policies [Line Items]
Decrease In accumulated deficit	$ 700,000
Accumulated deficit	$ 1,616,000,000	$ (2,047,853,000)		$ (2,047,853,000)		$ (1,946,433,000)	$ (1,616,015,000)
Number of reporting segments (in segments) | segment				2
Amortization expense due to recognition of premium deficiency reserve				$ 0		$ 0
General and Administrative Expense
Accounting Policies [Line Items]
Amortization expense of deferred acquisition costs		$ 1,000,000	$ 1,900,000	$ 4,900,000	$ 13,700,000