Finance Receivables, net (Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Receivables [Abstract]
Amortized cost	$ 0		$ 0
Negative allowance for expected recoveries	4,637,094		4,688,024
Balance as of end of period	4,637,094	$ 4,308,334	4,688,024	$ 4,140,742
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance as of end of period	4,637,094	4,308,334	4,688,024	4,140,742
Initial negative allowance for expected recoveries - acquisitions	220,850	291,702
Foreign currency translation adjustment	(28,075)	113,086
Financing Receivable, Allowance for Credit Loss, Recovery	(287,591)	(265,118)
Changes in estimated recoveries	43,886	27,922
Core
Receivables [Abstract]
Balance as of end of period	4,344,825	3,986,864	4,383,201	3,809,723
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance as of end of period	4,344,825	3,986,864	4,383,201	3,809,723
Initial negative allowance for expected recoveries - acquisitions	202,950	273,893
Foreign currency translation adjustment	(25,774)	108,406
Financing Receivable, Allowance for Credit Loss, Recovery	(255,906)	(231,483)
Changes in estimated recoveries	40,354	26,325
Insolvency
Receivables [Abstract]
Balance as of end of period	292,269	321,470	304,823	331,019
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance as of end of period	292,269	321,470	$ 304,823	$ 331,019
Initial negative allowance for expected recoveries - acquisitions	17,900	17,809
Foreign currency translation adjustment	(2,301)	4,680
Financing Receivable, Allowance for Credit Loss, Recovery	(31,685)	(33,635)
Changes in estimated recoveries	$ 3,532	$ 1,597