Consolidated Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accounts Receivable - Allowance For Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 4,954		$ 4,952		$ 10,357
Provision charged to expense	245		424		1,408
Reserve adjustments	(136)		(401)		(6,633)
Write-offs, net of recoveries	(103)		(21)		(180)
Balance at end of period	4,960		4,954		4,952
Finance Receivables - Allowance For Credit Losses [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	107,667		125,449		173,589
Provision charged to expense	60,008		22,239		17,031
Write-offs, net of recoveries	(56,982)		(40,021)		(65,171)
Balance at end of period	110,693		107,667		125,449
Inventories - Allowance For Obsolescence [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	22,936	[1]	23,204	[1]	34,180	[1]
Provision charged to expense	5,254	[1]	9,489	[1]	4,885	[1]
Reserve adjustments	(1,281)	[1]	(696)	[1]	(466)	[1]
Write-offs, net of recoveries	(9,446)	[1]	(9,061)	[1]	(15,395)	[1]
Balance at end of period	17,463	[1]	22,936	[1]	23,204	[1]
Deferred Tax Assets - Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	16,314		14,914		27,048
Reserve adjustments	5,504		1,400		(12,134)
Balance at end of period	$ 21,818		$ 16,314		$ 14,914

[1] Inventory obsolescence reserves deducted from cost determined on first-in first-out (FIFO) basis, before deductions for last-in, first-out (LIFO) valuation reserves.