Investments and other assets - Components of Investments and Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments, All Other Investments [Abstract]
Cash value insurance	$ 48,958	$ 53,189
Available-for-sale debt security	0	23,800
Equity method investments	17,143	21,986
Other equity investments	20,158	20,331
Deferred debt issuance costs	4,033	5,805
Long-term contract assets	22,253	0
Other long-term assets	30,875	27,397
Total	$ 143,420	$ 152,508