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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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	$ 4,956	$ (2,200)	$ 12,803	$ 3,485