Derivatives and Hedging - Location of Gains in Consolidated Condensed Statements of Operations that were Recognized and Derivative Contract Type (Details) (Other income, Net, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other income, Net
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency exchange contracts, amount of net gain recognized in income on derivatives not designated as hedging instruments	$ (5,565)	$ (4,884)	$ 7,238	$ (1,399)