Organization and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 295,602	$ 62,582
Restricted cash	7,077	71,648
Total cash, cash equivalents, and restricted cash shown on consolidated statement of cash flows	$ 302,679	$ 134,230	$ 88,704	$ 87,200