Investments (Tables)

12 Months Ended

Dec. 31, 2011

Investment [Line Items]

Amortized Cost, Gross Unrealized Gains And Losses And Estimated Fair Value Of Available For Sale Investments Classified As Current Assets

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
2011
Bonds and notes:
U.S. Government and agencies	$	139,940	$	13	$	1	$	139,952
All other corporates		5,649		70		–		5,719
Total fixed maturities		145,589		83		1		145,671
Other investments		1,005		–		699		306
Total current available for sale investments	$	146,594	$	83	$	700	$	145,977
2010
Bonds and notes:
U.S. Government and agencies	$	246,996	$	21	$	–	$	247,017
All other corporates		6,277		300		5		6,572
Total fixed maturities	$	253,273	$	321	$	5	$	253,589

Amounts Recognized In Consolidated Statements Of Operation Related To Notes Receivable

	2011		2010		2009
Classified as investment and other income:
Interest income on FMG Note	$	214,455	$	149,257	$	66,079
Interest accreted on zero-coupon note component	$	4,533	$	4,030	$	3,582
Amortization expense on prepaid mining interest	$	11,800	$	9,943	$	7,293

Amortized Cost, Gross Unrealized Gains And Losses And Estimated Fair Value Of Available For Sale Investments Classified As Non-Current Assets

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
2011
Bonds and notes:
U.S. Government-Sponsored Enterprises	$	609,617	$	12,683	$	109	$	622,191
All other corporates		66,960		636		1,054		66,542
Total fixed maturities		676,577		13,319		1,163		688,733
Equity securities:
Common stocks:
Banks, trusts and insurance companies		22,084		28,887		–		50,971
Industrial, miscellaneous and all other		644,717		669,270		299		1,313,688
Total equity securities		666,801		698,157		299		1,364,659
Other investments		995		–		494		501
	$	1,344,373	$	711,476	$	1,956	$	2,053,893
2010
Bonds and notes:
U.S. Government and agencies	$	7,806	$	–	$	90	$	7,716
U.S. Government-Sponsored Enterprises		815,066		10,564		2,247		823,383
All other corporates		191,851		917		235		192,533
Total fixed maturities		1,014,723		11,481		2,572		1,023,632
Equity securities:
Common stocks:
Banks, trusts and insurance companies		16,340		32,936		–		49,276
Industrial, miscellaneous and all other		760,594		1,833,229		492		2,593,331
Total equity securities		776,934		1,866,165		492		2,642,607
	$	1,791,657	$	1,877,646	$	3,064	$	3,666,239

Amortized Cost And Estimated Fair Value Of Non-Current Investments Classified As Available For Sale By Contractual Maturity

	Amortized		Estimated
	Cost		Fair Value
	(In thousands)
Due after one year through five years	$	24,918	$	25,024
Due after five years through ten years		–		–
Due after ten years		–		–
		24,918		25,024
Mortgage-backed and asset-backed securities		651,659		663,709
	$	676,577	$	688,733

Current Investments [Member]

Investment [Line Items]

Summary Of Investments

	2011				2010
			Carrying Value				Carrying Value
	Amortized		and Estimated		Amortized		and Estimated
	Cost		Fair Value		Cost		Fair Value
Investments available for sale	$	146,594	$	145,977	$	253,273	$	253,589
Other investments, including accrued interest income		4,113		4,158		11,067		10,983
Total current investments	$	150,707	$	150,135	$	264,340	$	264,572

Non-Current Investments [Member]

Investment [Line Items]

Summary Of Investments

	2011				2010
			Carrying Value				Carrying Value
	Amortized		and Estimated		Amortized		And Estimated
	Cost		Fair Value		Cost		Fair Value
Investments available for sale:
Fortescue	$	115,703	$	569,256	$	219,723	$	1,659,617
Inmet		504,006		708,193		504,006		862,481
Other investments available for sale		724,664		776,444		1,067,928		1,144,141
Other investments:
Private equity funds		85,528		85,528		86,944		86,944
Non-agency mortgage-backed bond
securitization portfolio		1,649		1,649		3,304		3,304
FMG zero coupon note component		40,801		40,801		36,268		36,268
Other non-publicly traded investments		45,298		45,004		40,114		39,904
Total non-current investments	$	1,517,649	$	2,226,875	$	1,958,287	$	3,832,659