Receivables - Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Trade receivables:
Gross trade receivables	$ 179,016	$ 185,065
Allowance for credit losses	(4,456)	(4,587)	$ (4,718)	$ (5,024)
Net trade receivables	174,560	180,478
Income tax receivables	3,322	4,167
Other receivables	9,727	9,651
Total receivables, net	$ 187,609	$ 194,296