Segment information (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intersegment activity eliminated in arriving at consolidated totals was included in the All Other category
Income taxes	$ 365,121	$ 356,628	$ 139,400
Net income (loss)	859,479	736,161	379,891
Intersegment activity eliminated in consolidated totals [Member]
Intersegment activity eliminated in arriving at consolidated totals was included in the All Other category
Revenues	(64,239)	(41,508)	(47,114)
Expenses	(14,146)	(15,527)	(19,164)
Income taxes	(20,383)	(10,572)	(11,373)
Net income (loss)	$ (29,710)	$ (15,409)	$ (16,577)

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

+ References+ Details

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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+ Details