Unconsolidated Investments 2 (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Citrus [Member]
Statement of Operations Data [Line Items]
Revenues	$ 201,458	$ 146,543	$ 509,704	$ 401,254
Operating income	123,377	83,124	291,975	212,818
Net earnings	50,152	55,182	146,678	131,269
Other Unconsolidated Investments [Member]
Statement of Operations Data [Line Items]
Revenues	3,423	6,237	8,505	17,921
Operating income	934	3,343	2,571	9,825
Net earnings	$ 901	$ 3,354	$ 2,745	$ 9,624