Leases - Schedule of Components of Lease Expense (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lease Cost
Operating lease cost	$ 4,724	$ 14,027
Short-term lease cost	402	1,024
Variable lease cost	162	521
Total lease cost	5,288	15,572
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	4,306	13,729
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 3,837	$ 11,066
Weighted-average remaining lease term- operating leases	9 years 2 months 4 days	9 years 2 months 4 days
Weighted-average discount rate - operating leases	4.95%	4.95%