Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Lease assets	$ 45,203	$ 61,618
Liabilities
Accrued liabilities	17,081	19,013
Lease liabilities	30,115	44,447
Total lease liabilities	$ 47,196	$ 63,460
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent