Summary of Significant Accounting Policies - Leases (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Option	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable lease expense and short-term lease expenses			$ 3,400	$ 4,200
Weighted average discount rate	4.20%		4.20%		3.90%
Lease expense	$ 6,900	$ 6,200	$ 13,400	11,800
Weighted average remaining lease term	7 years 8 months 12 days		7 years 8 months 12 days		8 years 1 month 6 days
Rent paid to related parties	$ 1,600	$ 700	$ 2,500	$ 2,000
Existence of option to extend			true
Summary of lease asset and liabilities
Lease right-of-use assets	97,586		$ 97,586		$ 84,073
Lease Liabilities
Other current liabilities	$ 16,701		$ 16,701		14,016
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current		Other Liabilities, Current
Long-term lease liabilities	$ 83,753		$ 83,753		72,697
Present Value of Lease Liabilities	$ 100,454		$ 100,454		$ 86,713
Minimum
Lessee, Lease, Description [Line Items]
Lease term	3 years		3 years
Number of options to renew | Option			1
Maximum
Lessee, Lease, Description [Line Items]
Lease term	10 years		10 years