Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of income loss from continuing operations before income taxes and noncontrolling shareholders' interests
Income (loss) from continuing operations before income taxes and noncontrolling shareholders' interest	$ 134,146	$ 159,826	$ 115,523
U.S. [Member]
Components of income loss from continuing operations before income taxes and noncontrolling shareholders' interests
Income (loss) from continuing operations before income taxes and noncontrolling shareholders' interest	21,763	67,579	35,200
Foreign [Member]
Components of income loss from continuing operations before income taxes and noncontrolling shareholders' interests
Income (loss) from continuing operations before income taxes and noncontrolling shareholders' interest	$ 112,383	$ 92,247	$ 80,323