Revenue recognition - Summary of Deferred Revenue Balances by Reportable Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 317,903	$ 282,414	$ 278,279
Enterprise
Disaggregation of Revenue [Line Items]
Total deferred revenue	255,886	220,127	219,030
Consumer
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 62,017	$ 62,287	$ 59,249