Business Segments And Foreign Operations (Segment Information By Geographical Locations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Revenue	$ 4,662,264	[1]	$ 4,176,627	[1]	$ 4,287,130	[1]
Revenue from Financial Services	649,449	[1]	682,709	[1]	494,779	[1]
Long-lived assets	881,660	[2]	904,653	[2]	984,071	[2]
United States [Member]
Segment Reporting Information [Line Items]
Revenue	3,155,608	[1]	2,818,032	[1]	2,910,094	[1]
Revenue from Financial Services	619,214	[1]	652,849	[1]	466,161	[1]
Long-lived assets	822,089	[2]	842,461	[2]	918,659	[2]
Europe [Member]
Segment Reporting Information [Line Items]
Revenue	781,432	[1]	699,492	[1]	700,882	[1]
Revenue from Financial Services	4,471	[1]	3,497	[1]	3,164	[1]
Japan [Member]
Segment Reporting Information [Line Items]
Revenue	229,427	[1]	234,247	[1]	255,901	[1]
Canada [Member]
Segment Reporting Information [Line Items]
Revenue	154,314	[1]	157,606	[1]	175,964	[1]
Revenue from Financial Services	25,764	[1]	26,363	[1]	25,454	[1]
Australia [Member]
Segment Reporting Information [Line Items]
Revenue	141,392	[1]	136,172	[1]	137,626	[1]
Other Foreign Countries [Member]
Segment Reporting Information [Line Items]
Revenue	200,091	[1]	131,078	[1]	106,663	[1]
International [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 59,571	[2]	$ 62,192	[2]	$ 65,412	[2]

[1] Revenue is attributed to geographic regions based on location of customer.

[2] Long-lived assets include all long-term assets except those specifically excluded under ASC Topic 280, "Segment Reporting," such as deferred income taxes and finance receivables.