Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 137,676	$ 4,978	$ 158,916	$ 31,854
Other comprehensive (loss) income:
Changes in unrealized (losses) gains on investment securities	(41)	20	57	216
Comprehensive income	$ 137,635	$ 4,998	$ 158,973	$ 32,070