Additional Balance Sheet and Cash Flow Information - Reconciliation Of Net Income (Loss) To Net Cash Provided By Operating Activities Of Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 1,298	$ 423,635	$ 531,451
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization	185,715	232,537	264,863
Amortization of deferred loan origination costs	71,142	76,326	81,315
Amortization of financing origination fees	14,435	9,823	8,367
Provision for long-term employee benefits	40,833	13,344	36,481
Employee benefit plan contributions and payments	(20,722)	(13,256)	(10,544)
Stock compensation expense	23,494	33,733	35,539
Net change in wholesale finance receivables related to sales	531,701	(5,822)	(56,538)
Provision for credit losses	181,870	134,536	106,870
Deferred income taxes	(44,079)	21,547	(33,981)
Other, net	13,826	298	37,554
Changes in current assets and liabilities:
Accounts receivable, net	127,657	44,902	9,143
Finance receivables – accrued interest and other	7,418	(11,119)	773
Inventories, net	80,858	(47,576)	(31,059)
Accounts payable and accrued liabilities	(43,087)	(18,462)	196,192
Derivative financial instruments	(3,481)	1,936	473
Other	9,012	(28,110)	29,022
Total change in current assets and liabilities	1,176,592	444,637	674,470
Net cash provided by operating activities	1,177,890	868,272	1,205,921
Supplemental Cash Flow Information [Abstract]
Interest	245,961	229,678	207,484
Income taxes	$ 30,675	$ 149,828	$ 149,436