Investments (Tables)

12 Months Ended

Dec. 31, 2011

Investments [Abstract]

Summary Of Investments Classified As AFS

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
			(Amounts are in thousands)
2011
Tax exempt bonds	$	2,488,135		36,657		550		2,524,242
Taxable bonds		1,226,136		20,015		1,514		1,244,637
Restricted investments		170,000		---		3,019		166,981
Equity securities		296,105		35,564		14,274		317,395
	$	4,180,376		92,236		19,357		4,253,255
2010
Tax exempt bonds	$	1,932,466		13,308		8,322		1,937,452
Taxable bonds		867,430		16,108		2,542		880,996
Equity securities		219,737		60,536		2,688		277,585
	$	3,019,633		89,952		13,552		3,096,033

Amortized Cost And Fair Value Of Debt And Equity Securities Classified As AFS By Maturities

	2011				2010
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
			(Amounts are in thousands)
Due in one year or less	$	445,296		447,972		332,992		336,282
Due after one year through five years		2,492,484		2,524,020		1,499,176		1,506,731
Due after five years through ten years		348,427		356,808		337,677		335,056
Due after ten years		428,064		440,079		630,051		640,379
		3,714,271		3,768,879		2,799,896		2,818,448
Restricted investments		170,000		166,981		---		---
Equity securities		296,105		317,395		219,737		277,585
	$	4,180,376		4,253,255		3,019,633		3,096,033

Summary Of Temporarily Impaired AFS Securities By The Time Period Impaired

	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
					(Amounts are in thousands)
2011
Tax exempt bonds	$	138,892		536		6,026		14		144,918		550
Taxable bonds		201,538		1,514		---		---		201,538		1,514
Restricted investments		166,981		3,019		---		---		166,981		3,019
Equity securities		86,236		13,899		1,889		375		88,125		14,274
Total temporarily impaired AFS securities	$	593,647		18,968		7,915		389		601,562		19,357
2010
Tax exempt bonds	$	624,553		8,321		54		1		624,607		8,322
Taxable bonds		155,160		2,045		4,130		497		159,290		2,542
Equity securities		30,065		1,914		3,571		774		33,636		2,688
Total temporarily impaired AFS securities	$	809,778		12,280		7,755		1,272		817,533		13,552