Commitments and Contingencies - Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Current portion included in accrued and other current liabilities	$ 2,395	$ 1,679
Long-term portion of lease liabilities	51,067	51,349	[1]
Total operating lease liabilities	$ 53,462	$ 53,028

[1] The balance sheet as of December 31, 2019 is derived from the audited financial statements as of that date.