Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Period	$ 30,168		$ 28,075		$ 23,090
Charged To Cost And Expenses	11,460		16,979		19,281
Additions (Deductions) Describe	(9,408)	[1]	(14,886)	[1]	(14,296)	[1]
Balance At End of Period	32,220		30,168		28,075
Inventory obsolescense reserve [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Period	14,242		15,009		12,419
Charged To Cost And Expenses	3,885		5,350		6,497
Additions (Deductions) Describe	(3,890)	[2]	(6,117)	[2]	(3,907)	[2]
Balance At End of Period	14,237		14,242		15,009
Tax valuation allowances [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Period	81,981		65,050		75,507
Charged To Cost And Expenses	37		4,526		6,275
Additions (Deductions) Describe	10,525	[3]	12,405	[3]	(16,732)	[3]
Balance At End of Period	92,543		81,981		65,050
Accrued warranty cost [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Period	18,252		21,506		16,798
Charged To Cost And Expenses	13,658		6,427		14,112
Additions (Deductions) Describe	(12,068)	[2]	(9,681)	[2]	(9,404)	[2]
Balance At End of Period	19,842		18,252		21,506
Accrued product liability [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Period	24,160		23,989		23,758
Charged To Cost And Expenses	8,917		8,523		7,880
Additions (Deductions) Describe	(11,329)	[4]	(8,352)	[4]	(7,649)	[4]
Balance At End of Period	$ 21,748		$ 24,160		$ 23,989

[1] Uncollectible accounts written off, net of recoveries.

[2] Amounts written off or payments incurred.

[3] Other activity not affecting federal or foreign tax expense.

[4] Loss and loss adjustment.