Preferred stock - Narrative (Details)	Sep. 30, 2022 $ / shares shares	Dec. 31, 2021 $ / shares shares
Stockholders' Equity Note [Abstract]
Preferred stock, shares authorized (shares) | shares	100,000,000	100,000,000
Preferred stock, par value (usd per share) | $ / shares	$ 0.01	$ 0.01
Preferred stock, percentage ownership by subsidiary	1