Commitments and Contingencies - Schedule of Additional Leases Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Supplemental Income Statement Information:
Operating lease cost	$ 3,970	$ 12,270
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,818	$ 14,655
Other Information
Weighted-average remaining lease term - operating leases	4 years 11 months 12 days	4 years 11 months 12 days
Weighted-average discount rate - operating leases	4.00%	4.00%
Right-of-use assets obtained in exchange for lease obligations (e.g. new leases commenced during the period):	$ 6,445	$ 7,617