Change in Accounting Principle (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 01, 2020	Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Purchase price	$ 3,514,165	$ 177,600	$ 615,336
Allowance for credit losses	125,757,689	852,815	3,474,173
Noncredit discount	3,240,131	168,288	562,998
Face value	132,511,985	1,198,703	4,652,507
Writeoffs, net	(125,757,689)
Expected recoveries	3,514,165	282,473	784,056
Initial negative allowance for expected recoveries	$ 3,514,165	$ 3,332,748	$ 3,332,748	$ 3,351,532	$ 3,514,165