Finance Receivables, net Finance Receivables, net (Recoveries) (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		$ 498,678
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		262,022	$ 0
Expected recoveries	$ 3,514,165	236,656
Core
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		440,694
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		241,656
Expected recoveries		199,038
Insolvency
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance For Credit Losses, Recoveries And Other Adjustments		57,984
Financing Receivable, Allowance For Credit Losses, Recoveries Reclassified To Income		20,366
Expected recoveries		$ 37,618