Summary Of Significant Accounting Policies (Changes In Warranty And Safety Recall Liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning of period	$ 69,250	$ 64,120	$ 60,263
Warranties issued during the period	59,259	60,331	59,022
Settlements made during the period	(96,529)	(74,262)	(64,462)
Recalls and changes to pre-existing warranty liabilities	42,237	19,061	9,297
Balance, end of period	$ 74,217	$ 69,250	$ 64,120