Significant Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Entity	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Schedule of Equity Method Investments [Line Items]
Overstatement in each of cash and cash equivalent, accounts payable and accrued expenses and in net cash provided by operating activities			$ 13.1
Wholly-owned bankruptcy remote special-purpose corporations	6
Undistributed earnings of foreign subsidiaries and affiliates	505.7
Gain (Losses) from foreign currency transactions and from re-measurement of non-functional currency denominated assets and liabilities		(1.6)	(1.7)	0.4
Interest expense net of interest income on bank deposits	0.7	0.2	0.5
Non-performing [Member]
Schedule of Equity Method Investments [Line Items]
Net book value of leveraged lease investment	$ 16.0