Investments and other assets - Components of Investments and Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investments, All Other Investments [Abstract]
Cash value insurance	$ 48,487	$ 53,189
Available-for-sale debt security	0	23,800
Equity method investments	16,973	21,986
Other equity investments	20,158	20,331
Deferred debt issuance costs	3,133	5,805
Long-term contract assets	18,981	0
Other long-term assets	29,327	27,397
Total	$ 137,059	$ 152,508