Finance Receivables, net Finance Receivables, net (Recoveries) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		$ 522,723		$ 1,534,612
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		240,250	$ 0	750,556	$ 0
Expected recoveries	$ 3,514,165	282,473		784,056
Core
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		470,056		1,371,988
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		223,318		694,777
Expected recoveries		246,738		677,211
Insolvency
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		52,667		162,624
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		16,932		55,779
Expected recoveries		$ 35,735		$ 106,845