Commitments and Contingent Liabilities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Letters of Credit [Abstract]
Outstanding in letters of credit with financial institutions	$ 69,860
Letters of Credit Expiration Dates	2012 through 2016
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	42,524	40,032
Provision for warranties	17,458	18,488
Settlements made	(17,528)	(17,830)
Other adjustments, including currency translation	2,348	730
Ending Balance	$ 44,802	$ 41,420