Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Taxes (Textuals) [Abstract]
Income tax expense	$ 12,170,000	$ 9,538,000	$ 5,961,000	$ 9,009,000
Foreign income tax expense	6,600,000		16,200,000
Valuation Allowance, Deferred Tax Asset, Change in Amount			6,600,000
Gross unrecognized tax benefits	11,900,000		11,900,000		8,200,000
U.S. [Member]
Income Taxes (Textuals) [Abstract]
Operating loss carryforwards	341,300,000		341,300,000
Operating loss carryforwards, expiration dates			at various times through 2033
Non-U.S. [Member]
Income Taxes (Textuals) [Abstract]
Operating loss carryforwards	40,200,000		40,200,000
Operating loss carryforwards, expiration dates			at various times through 2019
Characterization of Deduction [Member]
Income Taxes (Textuals) [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	2,800,000		2,800,000
Revenue Attribution [Member]
Income Taxes (Textuals) [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions			800,000
Application of a Law Change [Member]
Income Taxes (Textuals) [Abstract]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions			1,600,000
Settlement with Taxing Authority [Member]
Income Taxes (Textuals) [Abstract]
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions			1,500,000
Revaluation Due to Tax Incentives [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	2,800,000		2,800,000
Reversal of Deferred Tax Liability for Undistributed Earnings [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ (9,200,000)