Finance Receivables - Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Credit Quality Indicator [Line Items]
Total financing receivables	$ 6,911,300	$ 6,833,944	$ 7,572,947	$ 7,411,816	$ 7,157,557
Wholesale
Financing Receivable, Credit Quality Indicator [Line Items]
2021	380,211	391,151
2020	11,379	72,048
2019	11,047	13,443
2018	10,565	7,887
2017	3,662	2,297
2016 & Prior	917	2,923
Total financing receivables	417,781	489,749	$ 1,156,519	$ 1,083,615	$ 1,016,957
Wholesale | Non-Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016 & Prior	0	0
Total financing receivables	0	0
Wholesale | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016 & Prior	0	0
Total financing receivables	0	0
Wholesale | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016 & Prior	0	0
Total financing receivables	0	0
Wholesale | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	658
2020	0	365
2019	0	31
2018	0	0
2017	0	0
2016 & Prior	0	0
Total financing receivables	0	1,054
Wholesale | Medium Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,925
2020	0	242
2019	0	0
2018	0	0
2017	0	0
2016 & Prior	0	0
Total financing receivables	0	2,167
Wholesale | Low Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2021	380,211	388,568
2020	11,379	71,441
2019	11,047	13,412
2018	10,565	7,887
2017	3,662	2,297
2016 & Prior	917	2,923
Total financing receivables	$ 417,781	$ 486,528