Organization and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash	$ 328,936	$ 295,602
Cash collateral posted to counterparties	49,180	14,758
Total cash and cash posted to counterparties shown on consolidated statement of cash flows	378,116	$ 310,360	$ 115,800	$ 136,230
Prior Period Reclassification Adjustment	$ 7,681