Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating and finance leases	$ 59,192	$ 54,541	$ 54,300
Financing cash flows from finance leases	1,199	879	1,205
Right-of-use assets obtained in exchange for new operating and finance lease liabilities	$ 96,988	$ 41,616	$ 33,933
Weighted average remaining lease term (years)
Operating leases	4 years 10 months 24 days	5 years 2 months 12 days	5 years 1 month 6 days
Finance leases	6 years 4 months 24 days	7 years 10 months 24 days	8 years 9 months 18 days
Weighted average discount rate
Operating leases	8.80%	11.80%	11.90%
Finance leases	10.80%	12.30%	9.70%