Investments and other assets - Components of Investments and Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investments, All Other Investments [Abstract]
Cash value insurance	$ 49,552	$ 48,919
Equity method investments	16,928	17,003
Other equity investments	20,158	20,158
Deferred debt issuance costs	1,341	2,232
Long-term contract assets	12,925	14,135
Other long-term assets	21,690	24,047
Total	$ 122,594	$ 126,494