Leases - Schedule of Components of Lease Expense (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lease Cost
Operating lease cost	$ 4,551	$ 9,303
Short-term lease cost	328	622
Variable lease cost	240	359
Total lease cost	5,119	10,284
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	4,826	9,423
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 3,559	$ 7,229
Weighted-average remaining lease term- operating leases	9 years 14 days	9 years 14 days
Weighted-average discount rate - operating leases	4.97%	4.97%