Investments (Tables)

3 Months Ended

Mar. 31, 2012

Schedule of Investments [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
March 31, 2012
Bonds and notes:
U.S. Government and agencies	$	116,928	$	7	$	6	$	116,929
All other corporates		4,160		18		–		4,178
Total fixed maturities		121,088		25		6		121,107
Other investments		333		–		–		333
Total current available for sale investments	$	121,421	$	25	$	6	$	121,440
December 31, 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

Amounts Recognized In Consolidated Statements Of Operation Related To Notes Receivable

	March 31,		March 31,
	2012		2011
Classified as investment and other income:
Interest income on FMG Note	$	45,069	$	37,413
Interest accreted on zero-coupon note component	$	1,218	$	1,083
Amortization expense on prepaid mining interest	$	2,895	$	2,116

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
March 31, 2012
Bonds and notes:
U.S. Government and agencies	$	10,004	$	–	$	18	$	9,986
U.S. Government-Sponsored Enterprises		585,312		14,912		48		600,176
All other corporates		81,332		637		1,041		80,928
Total fixed maturities		676,648		15,549		1,107		691,090
Equity securities:
Common stocks:
Banks, trusts and insurance companies		22,084		25,939		–		48,023
Industrial, miscellaneous and all other		557,519		289,969		82		847,406
Total equity securities		579,603		315,908		82		895,429
	$	1,256,251	$	331,457	$	1,189	$	1,586,519
December 31, 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

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	$	30,380	$	30,611
Due after five years through ten years		–		–
Due after ten years		–		–
		30,380		30,611
Mortgage-backed and asset-backed securities		646,268		660,479
	$	676,648	$	691,090

Current Investments [Member]

Schedule of Investments [Line Items]

Summary Of Investments

	March 31, 2012				December 31, 2011
			Carrying Value				Carrying Value
	Amortized		and Estimated		Amortized		And Estimated
	Cost		Fair Value		Cost		Fair Value
Investments available for sale	$	121,421	$	121,440	$	146,594	$	145,977
Other investments, including accrued interest income		3,977		4,040		4,113		4,158
Total current investments	$	125,398	$	125,480	$	150,707	$	150,135

Non-Current Investments [Member]

Schedule of Investments [Line Items]

Summary Of Investments

	March 31, 2012				December 31, 2011
			Carrying Value				Carrying Value
	Amortized		and Estimated		Amortized		And Estimated
	Cost		Fair Value		Cost		Fair Value
Investments available for sale:
Fortescue	$	27,100	$	183,853	$	115,703	$	569,256
Inmet Mining Corporation ("Inmet")		504,006		623,603		504,006		708,193
Other investments available for sale		725,145		779,063		724,664		776,444
Other investments:
Private equity funds		84,530		84,530		85,528		85,528
FMG Chichester Pty Ltd ("FMG")
zero coupon note component		42,019		42,019		40,801		40,801
Other non-publicly traded investments		46,421		46,359		46,947		46,653
Total non-current investments	$	1,429,221	$	1,759,427	$	1,517,649	$	2,226,875