Background and Significant Accounting Policies (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Foreign Currency Translation
Foreign currency (loss) gain	$ (8,200,000)	$ (16,500,000)	$ 4,900,000
Non-cash (loss) gain from foreign currency exchange rate changes on intercompany obligations	(7,400,000)	(14,200,000)	6,300,000
Correction of Misclassifications
Net cash provided by (used in) investing activities	(205,451,000)	(239,184,000)	(102,965,000)
Net cash provided by (used in) financing activities	(171,290,000)	99,290,000	(298,667,000)
Correction of Misclassification in the Statement of Cash Flows | As previously reported
Correction of Misclassifications
Net cash provided by (used in) investing activities		50,724,000	6,400,000
Net cash provided by (used in) financing activities		(190,618,000)	(408,032,000)
Correction of Misclassification in the Statement of Cash Flows | Increase (decrease)
Correction of Misclassifications
Net cash provided by (used in) investing activities		(289,908,000)	(109,365,000)
Net cash provided by (used in) financing activities		$ 289,908,000	$ 109,365,000