Equity Plans (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, decrease for tax withholding obligation				$ 7,200
Share-based payment arrangement, noncash expense including restructuring and other related charges		$ 7,600		13,500
Share-based compensation expense, related to restructuring and other related charges		7,648	$ 8,683	13,293	$ 16,812
Total unrecognized share-based compensation costs		40,500		$ 40,500
Total unrecognized share-based compensation costs, remaining period of recognition				2 years 6 months
Restructuring Charges
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, related to restructuring and other related charges		$ 200		$ 200
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in shares)	297,325	1,792,097
Vesting period (in years)	3 years	3 years
Number of shares vested in period (in shares)		131,640
Shares surrendered to the company for tax withholding (in shares)		71,801		387,675
RSUs | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New shares of company's class A common stock issued (in shares)		63,442		495,749
RSUs | Executive Officer | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested in period (in shares)		135,243		883,424