Leases - Components of lease expense, and lease assets and liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease Cost:
Amortization of right-of-use assets (included in depreciation expense)	$ 444	$ 727
Interest on lease liabilities	192	428
Operating lease cost	16,155	15,930
Short-term lease cost	339	573
Variable lease cost	1,737	1,748
Total lease cost	18,867	19,406
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for finance lease	212	462
Operating cash flows used for operating leases	16,721	15,627
Financing cash flows used for finance lease	873	1,351	$ 1,168
Right-of-use assets obtained in exchange for new operating lease liabilities	32,811	17,607
Assets and Liabilities, Lessee [Abstract]
Finance lease right-of-use assets (included in other assets)	$ 760	$ 2,448
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, net	Other assets, net
Operating lease right-of-use assets	$ 99,158	$ 79,966
Finance lease liability, current (included in current installments of long-term debt)	$ 165	$ 1,661
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current installments of long-term debt	Current installments of long-term debt
Finance lease liability, noncurrent (included in long-term debt)	$ 529	$ 2,832
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt, less current installments	Long-term debt, less current installments
Operating lease liabilities, current (included in accrued liabilities)	$ 13,465	$ 11,516
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Operating lease liabilities, noncurrent	$ 90,878	$ 72,120
Weighted average remaining lease term – finance leases	3 years 10 months 24 days	3 years
Weighted average remaining lease term – operating leases	10 years	10 years
Weighted average discount rate – finance leases	4.80%	9.00%
Weighted average discount rate – operating leases	4.10%	4.40%