Unconsolidated Investments 3 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Citrus [Member]
Statement of Operations Data [Line Items]
Revenues	$ 693,626	$ 517,158	$ 508,416
Operating income	391,707	269,789	271,897
Net earnings	185,380	180,927	129,683
Other Unconsolidated Investments [Member]
Statement of Operations Data [Line Items]
Revenues	9,801	22,492	20,395
Operating income	3,222	12,323	13,765
Net earnings	$ 2,892	$ 12,273	$ 13,680