Finance Receivables (Changes In The Allowance For Finance Credit Losses On Finance Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 147,178	$ 127,364	$ 110,693
Provision for credit losses	136,617	101,345	80,946
Charge-offs	(148,566)	(123,911)	(102,831)
Recoveries	41,405	42,380	38,556
Other	(3,291)
Balance, end of period	173,343	147,178	127,364
Retail
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	139,320	122,025	106,063
Provision for credit losses	137,893	98,826	80,237
Charge-offs	(148,566)	(123,911)	(102,831)
Recoveries	41,405	42,380	38,556
Other	(3,291)
Balance, end of period	166,761	139,320	122,025
Wholesale
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	7,858	5,339	4,630
Provision for credit losses	(1,276)	2,519	709
Charge-offs	0	0	0
Recoveries	0	0	0
Other	0
Balance, end of period	$ 6,582	$ 7,858	$ 5,339