Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Operating lease assets	$ 60,368	$ 76,548
Liabilities
Operating lease liabilities	$ 18,683	$ 20,345
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Noncurrent operating lease liabilities	$ 56,683	$ 69,531
Total operating lease liabilities	$ 75,366	$ 89,876