Consolidated Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance [Line Items]
Balance at end of period	$ 16,314	$ 14,914
Accounts Receivable - Allowance For Doubtful Accounts [Member]
Valuation Allowance [Line Items]
Balance at beginning of period	4,952	10,357	11,409
Provision charged to expense	424	1,408	3,216
Reserve adjustments	(401)	(6,633)	(3,837)
Write-offs, net of recoveries	(21)	(180)	(431)
Balance at end of period	4,954	4,952	10,357
Finance Receivables - Allowance For Credit Losses [Member]
Valuation Allowance [Line Items]
Balance at beginning of period	125,449	173,589	150,082
Allowance related to newly consolidated finance receivables	0	0	49,424
Provision for finance credit losses	22,239	17,031	93,118
Charge-offs, net of recoveries	(40,021)	(65,171)	(119,035)
Balance at end of period	107,667	125,449	173,589
Inventories - Allowance For Obsolescence [Member]
Valuation Allowance [Line Items]
Balance at beginning of period	23,204	34,180	34,745
Provision charged to expense	9,489	4,885	17,142
Reserve adjustments	(696)	(466)	636
Write-offs, net of recoveries	(9,061)	(15,395)	(18,343)
Balance at end of period	22,936	23,204	34,180
Deferred Tax Assets - Valuation Allowance [Member]
Valuation Allowance [Line Items]
Reserve adjustments	1,400	(12,134)	4,878
Balance at beginning of period	14,914	27,048	22,170
Balance at end of period	$ 16,314	$ 14,914	$ 27,048