Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 446,956	$ 440,956
Restricted cash	5,414	5,427
Total	$ 452,370	$ 446,383	$ 300,191	$ 283,008