Leases - Components of lease expense, and lease assets and liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Lease Cost:
Amortization of right-of-use assets (included in depreciation expense)	$ 24	$ 194
Interest on lease liabilities	8	92
Operating lease cost	4,274	3,794
Short-term lease cost	80	90
Variable lease cost	469	467
Total lease cost	4,855	4,637
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for finance lease	8	103
Operating cash flows used for operating leases	5,316	4,285
Financing cash flows used for finance lease	41	380
Right-of-use assets obtained in exchange for new operating lease liabilities	634	$ 12,124
Assets and Liabilities, Lessee [Abstract]
Finance lease right-of-use assets (included in other assets)	$ 736		$ 760
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, net		Other assets, net
Operating lease right-of-use assets	$ 92,423		$ 99,158
Finance lease liability, current (included in current installments of long-term debt)	$ 167		$ 165
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)	$ 486		$ 529
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)	$ 12,186		$ 13,465
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities		Accrued liabilities
Operating lease liabilities, noncurrent	$ 85,024		$ 90,878
Weighted average remaining lease term – finance leases	3 years 8 months 12 days		3 years 10 months 24 days
Weighted average remaining lease term – operating leases	10 years 1 month 6 days		10 years
Weighted average discount rate – finance leases	4.80%		4.80%
Weighted average discount rate – operating leases	4.10%		4.10%