Share-based payments - Summary of Restricted Common Stock Unit Activity (Details) - Restricted stock unit	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Units
Outstanding at beginning (in shares) | shares	338,700
Granted (in shares) | shares	188,302
Vested/Converted (in shares) | shares	(147,074)
Forfeited (in shares) | shares	(15,651)
Outstanding at ending (in shares) | shares	364,277
Nonvested balance at end of period (in shares) | shares	364,089
Weighted-Average Grant-Date Fair Value per Share ($)
Outstanding at beginning (in usd per share) | $ / shares	$ 49.89
Granted (in usd per share) | $ / shares	62.99
Vested/Converted (in usd per share) | $ / shares	45.90
Forfeited (in usd per share) | $ / shares	59.43
Outstanding at ending (in usd per share) | $ / shares	57.86
Nonvested balance at end of period (in usd per share) | $ / shares	$ 57.86