Derivative Financial Instruments (Details) (Level 2 [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Foreign currency derivatives [Member]
Derivative Liability Fair Value Net [Abstract]
Net Asset/ (Liabilities)	$ 7,258
Not a hedge [Member] | Currency Related Swap [Member]
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value	(17,562)
Net Asset/ (Liabilities)	(17,562)
Not a hedge [Member] | Foreign currency derivatives [Member]
Derivative Asset Fair Value Net [Abstract]
Assets Derivatives, Fair value, Total	8,223
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value, Total	(965)
Net Asset/ (Liabilities)	528
Cash flow hedge [Member] | Interest rate swap derivatives [Member]
Derivative Liability Fair Value Net [Abstract]
Net Asset/ (Liabilities)	(236)
Current assets [Member] | Not a hedge [Member] | Foreign currency derivatives [Member]
Derivative Asset Fair Value Net [Abstract]
Assets Derivatives, Fair value	1,493
Current liabilities [Member] | Not a hedge [Member] | Currency Related Swap [Member]
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value	(2,594)
Current liabilities [Member] | Not a hedge [Member] | Foreign currency derivatives [Member]
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value	(965)
Current liabilities [Member] | Cash flow hedge [Member] | Interest rate swap derivatives [Member]
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value, Total	(236)
Non current liabilities [Member] | Not a hedge [Member] | Currency Related Swap [Member]
Derivative Liability Fair Value Net [Abstract]
Liability Derivatives, Fair value	(14,968)
Non Current Assets [Member] | Not a hedge [Member] | Foreign currency derivatives [Member]
Derivative Asset Fair Value Net [Abstract]
Assets Derivatives, Fair value	6,730
Derivative Liability Fair Value Net [Abstract]
Net Asset/ (Liabilities)	$ 6,730