Investments in Securities - Weighted Average Lives of Trading Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value
Less than one year	$ 99,773	$ 99,973
Greater than one year and less than three years	0	5,323
Greater than three years and less than five years	0	472,774
Greater than five years	6,929,969	2,639,439
Securities, trading	7,029,742	3,217,509
Amortized Cost
Less than one year	99,889	99,978
Greater than one year and less than three years	0	5,365
Greater than three years and less than five years	0	475,600
Greater than five years	7,302,148	2,690,243
Amortized Cost	$ 7,402,037	$ 3,271,186