Restructuring, Impairment and Costs of Terminated Program, and Impairment of Goodwill - Non-cash Impairment Charges Pertaining 2022 Restructuring Plan (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Total impairment of lease assets	$ 10,567						$ 35,329	$ 53,401
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total impairment of lease assets	1,467	$ 13,255	$ 0	$ 12,361	$ 1,200	$ 52,200		80,483
Mission Bay Blvd. South | 2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total impairment of lease assets	1,467	7,055	0	361	1,200	3,000		13,083
Third St | 2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total impairment of lease assets	$ 0	$ 6,200	$ 0	$ 12,000	$ 0	$ 49,200		$ 67,400