Guarantees and Product Warranties (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Changes in warranty liability balance
Balance at January 1	$ 81,751		$ 63,355
Current period accruals	58,736	[1]	74,015	[1]
Current period settlements	(57,288)		(55,619)
Balance at December 31	83,199		81,751
Guarantees and Product Warranties (Textuals)
Carrying value of the bonds	11,900		11,900
Maximum future payment obligations	87,104		80,662
Standby letters of credit	26,035		23,435
Liability associated with Standby letters of credit	$ 0		$ 0

[1] Includes the impact of foreign exchange rate fluctuations.