Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income tax expiry period	2016 and 2026
Domestic net operating loss	$ 8,900,000
Foreign net operating loss	211,600,000
Liabilities related to uncertain tax position, inclusive of interest and penalties	30,700,000	21,900,000
Interest and penalties reported in Other noncurrent liabilities	900,000	900,000
Net liabilities after adjustments	8,000,000	8,700,000
Decrease in liabilities related to uncertain tax positions inclusive of interest and penalties	21,800,000	12,300,000
Unrecognized Tax Benefits	29,789,000	20,949,000	23,416,000	77,548,000
Reduction of interest and penalties			(2,800,000)
Decrease in the liability related to uncertain tax positions	5,900,000
Domestic Country [Member]
Domestic credits available to offset future payments of income taxes	51,300,000
Valuation allowance on operating loss carryovers	5,600,000
Valuation allowance on deferred tax asset	2,700,000
Foreign Country [Member]
Valuation allowance on operating loss carryovers	$ 102,700,000