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Commitments and Contingencies - Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating leases:
Operating lease right-of-use assets	$ 26,041	$ 11,002
Operating lease liabilities	27,527	12,615
Finance leases:
Finance lease right-of-use assets	365	379
Accumulated amortization	(267)	(170)
Finance lease right-of-use assets, net	98	209
Finance lease liabilities	$ 99	$ 212
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet

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Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Amount of lessee's right to use underlying asset under operating lease.

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