Investments and fair value measurements - Schedule of Investments on Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Marketable securities:	$ 357,109	$ 476,936
Strategic investments	0	10,311
Total assets	608,905	741,196
Other liabilities, non-current:
Total liabilities	412,648	384,304
Cash
Assets
Marketable securities:	37,300	38,900
Level 1
Assets
Strategic investments	0	0
Total assets	167,264	266,692
Liabilities
Cash settled stock appreciation rights	0
Other liabilities, non-current:
Cash settled stock appreciation rights	0	0
Total liabilities	0
Level 1 | U.S. government securities
Assets
Marketable securities:	0	0
Level 1 | Money market funds
Assets
Cash equivalents	160,819	266,692
Level 1 | Time deposits
Assets
Cash equivalents	6,445
Level 2
Assets
Strategic investments	0	0
Total assets	152,546	171,372
Liabilities
Cash settled stock appreciation rights	0
Other liabilities, non-current:
Cash settled stock appreciation rights	0	0
Total liabilities	0
Level 2 | U.S. government securities
Assets
Marketable securities:	152,546	171,372
Level 2 | Money market funds
Assets
Cash equivalents	0	0
Level 2 | Time deposits
Assets
Cash equivalents	0
Level 3
Assets
Strategic investments	0	10,311
Total assets	0	10,311
Liabilities
Cash settled stock appreciation rights	4
Other liabilities, non-current:
Cash settled stock appreciation rights	6	48
Total liabilities	10
Level 3 | U.S. government securities
Assets
Marketable securities:	0	0
Level 3 | Money market funds
Assets
Cash equivalents	0	$ 0
Level 3 | Time deposits
Assets
Cash equivalents	$ 0