Condensed Consolidated Statements of Cash Flows (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 124,467	$ 88,292
Restricted cash included in other current assets	$ 176	$ 6,630
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentAssetsMember	us-gaap:OtherCurrentAssetsMember
Total cash and cash equivalents and restricted cash at end of period	$ 124,643	$ 94,922