Finance Receivables - Changes In Allowance For Credit Losses On Finance Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 390,936	$ 198,581	$ 189,885
Provision for credit losses	25,049	181,870	134,536
Charge-offs	(122,637)	(139,944)	(173,358)
Recoveries	46,031	49,825	47,518
Balance, end of period	339,379	390,936	198,581
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		100,604
Balance, end of period			100,604
Retail
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	371,738	188,501	182,098
Provision for credit losses	31,338	175,225	132,243
Charge-offs	(122,637)	(137,371)	(173,358)
Recoveries	45,881	49,825	47,518
Balance, end of period	326,320	371,738	188,501
Retail | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		95,558
Balance, end of period			95,558
Wholesale
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	19,198	10,080	7,787
Provision for credit losses	(6,289)	6,645	2,293
Charge-offs	0	(2,573)	0
Recoveries	150	0	0
Balance, end of period	$ 13,059	19,198	10,080
Wholesale | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		$ 5,046
Balance, end of period			$ 5,046