Leases - Balance Sheet Composition (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating leases:
Operating lease, right-of-use asset	$ 106,586	$ 82,374
Operating leases:
Current lease liabilities	16,721	15,235
Noncurrent lease liabilities	94,250	69,928
Total lease liabilities	$ 110,971	$ 85,163
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Building
Operating leases:
Operating lease, right-of-use asset	$ 100,775	$ 75,381
Equipment
Operating leases:
Operating lease, right-of-use asset	$ 5,811	$ 6,993