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Basis of Preparation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accounting Policies [Abstract]
Minimum ownership percentage of investments in affiliates required to be accounted for under the equity method	20.00%		20.00%
Maximum ownership percentage of investments in affiliates required to be accounted for under the equity method	50.00%		50.00%
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives	$ (598)	$ 1,503	$ 603	$ 1,147

Amount of gain (loss) from the increase (decrease) in fair value of foreign currency derivatives and nonderivative instruments designated as fair value hedging instruments which were recognized in earnings, net of offsets by the gain (loss) on the hedged item to the extent that the fair value hedge was determined to be effective.

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