Leases - Summary of Lease Cost (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 1,632	$ 5,085
Variable lease cost(1)	1,083	2,686
Total lease costs	$ 2,715	$ 7,771
Weighted Average Remaining Lease Term	10 years	10 years
Weighted Average Discount Rate	6.20%	6.20%