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Derivative Instruments (Details 2) (USD $) In Thousands	3 Months Ended		6 Months Ended
Derivative Instruments (Details 2) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Gain and losses on derivative instruments
Gain (Loss) on derivative instruments, recognized in income	$ (271)	$ (3,614)	$ (2,149)	$ (7,951)
Interest Rate Contracts [Member] \| Loss on Derivatives [Member]
Gain and losses on derivative instruments
Gain (Loss) on derivative instruments, recognized in income	186	(4,620)	(616)	(7,323)
Foreign Exchange Contracts [Member] \| Loss on Derivatives [Member]
Gain and losses on derivative instruments
Gain (Loss) on derivative instruments, recognized in income	$ (457)	$ 1,006	$ (1,533)	$ (628)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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