Stock compensation and other employee benefit plans - Summary of outstanding restricted stock unit and restricted stock awards (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Granted, Shares	3,000,000
Vested, Shares	(4,704,127)
Stock-based compensation cost not yet recognized | $	$ 10,551
Weighted-average remaining expense recognition period (in years)	3 years 1 month 2 days
Restricted stock units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Nonvested, beginning balance, Shares	5,141,469
Granted, Shares	6,927,858
Vested, Shares	(3,435,814)
Forfeited, Shares	(1,560,850)
Nonvested, ending balance, Shares	7,072,663
Nonvested, beginning balance, Dollars per share | $ / shares	$ 6.08
Granted | $ / shares	3.71
Vested | $ / shares	4.93
Forfeited | $ / shares	5.55
Nonvested, ending balance, Dollars per share | $ / shares	$ 4.73
Stock-based compensation cost not yet recognized | $	$ 18,500
Weighted-average remaining expense recognition period (in years)	1 year 3 months 14 days