Lease - Schedule of Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 22,637	$ 27,251
Current portion of operating lease liabilities	6,073	7,871
Non-current portion of operating lease liabilities	19,325	22,159
Total operating lease liabilities	25,398	30,030
Cash paid for amounts included in the measurement of operating lease liabilities	7,049,000	10,137,000
Right-of-use assets obtained in exchange for operating lease liabilities	$ 3,693,000	$ 4,353,000
Weighted-average remaining lease term for operating leases	5 years 6 months	5 years 6 months
Weighted-average discount rate for operating leases	4.70%	4.70%