- Finance Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	$ 7,572,947	$ 7,411,816	$ 7,157,557	$ 7,008,801	$ 7,015,331
Allowance for credit losses	(198,581)	(189,885)	(192,471)	(173,343)	(147,178)
Total finance receivables, net	7,374,366	7,221,931	6,965,086	6,835,458	6,868,153
United States
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	7,248,116
Canada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	324,831
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	6,416,428	6,328,201	6,140,600	5,982,211	5,991,471
Allowance for credit losses	(188,501)	(182,098)	(186,254)	(166,810)
Retail | United States
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	6,180,236	6,103,378	5,901,002	5,769,410	5,803,071
Retail | Canada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	236,192	224,823	239,598	212,801	188,400
Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	1,156,519	1,083,615	1,016,957	1,026,590	1,023,860
Allowance for credit losses	(10,080)	(7,787)	(6,217)	(6,533)
Wholesale | United States
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	1,067,880	1,007,956	939,621	961,150	965,379
Wholesale | Canada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, gross	$ 88,639	$ 75,659	$ 77,336	$ 65,440	$ 58,481