Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Operating lease assets	$ 133,179	$ 139,385
Liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Current portion of operating lease liabilities	$ 12,763	12,728
Operating lease liabilities, less current portion	144,264	151,226
Total operating lease liabilities	$ 157,027	$ 163,954