Investment Securities (Tables)

9 Months Ended

Sep. 30, 2011

Investment Securities

Schedule Of Securities Classified As Current And Long-Term

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
September 30, 2011
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	859,543	$	21,656	$	(480	)	$	880,719
Mortgage-backed securities		1,711,452		91,379		(1,179	)		1,801,652
Tax-exempt municipal securities		2,617,120		112,228		(3,659	)		2,725,689
Mortgage-backed securities:
Residential		48,557		512		(1,641	)		47,428
Commercial		371,278		17,798		(1,165	)		387,911
Asset-backed securities		106,186		1,397		(130	)		107,453
Corporate debt securities		3,393,537		238,427		(27,569	)		3,604,395
Redeemable preferred stock		5,333		0		0			5,333
Total debt securities	$	9,113,006	$	483,397	$	(35,823	)	$	9,560,580
December 31, 2010
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	697,816	$	14,412	$	(615	)	$	711,613
Mortgage-backed securities		1,614,569		49,783		(1,173	)		1,663,179
Tax-exempt municipal securities		2,439,659		37,294		(43,619	)		2,433,334
Mortgage-backed securities:
Residential		58,017		545		(2,675	)		55,887
Commercial		306,291		14,911		(171	)		321,031
Asset-backed securities		148,068		1,727		(44	)		149,751
Corporate debt securities		2,906,228		139,793		(13,710	)		3,032,311
Redeemable preferred stock		5,333		0		0			5,333
Total debt securities	$	8,175,981	$	258,465	$	(62,007	)	$	8,372,439

Schedule Of Gross Unrealized Losses And Fair Values Of Securities

	Less than 12 months					12 months or more					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
September 30, 2011
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	168,248	$	(480	)	$	0	$	0		$	168,248	$	(480	)
Mortgage-backed securities		23,462		(517	)		19,428		(662	)		42,890		(1,179	)
Tax-exempt municipal securities		140,105		(1,634	)		66,439		(2,025	)		206,544		(3,659	)
Mortgage-backed securities:
Residential		4,911		(104	)		25,560		(1,537	)		30,471		(1,641	)
Commercial		42,559		(1,165	)		0		0			42,559		(1,165	)
Asset-backed securities		18,932		(112	)		3,656		(18	)		22,588		(130	)
Corporate debt securities		681,567		(25,344	)		16,505		(2,225	)		698,072		(27,569	)
Total debt securities	$	1,079,784	$	(29,356	)	$	131,588	$	(6,467	)	$	1,211,372	$	(35,823	)
December 31, 2010
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	141,766	$	(615	)	$	0	$	0		$	141,766	$	(615	)
Mortgage-backed securities		110,358		(1,054	)		5,557		(119	)		115,915		(1,173	)
Tax-exempt municipal securities		1,168,221		(33,218	)		97,809		(10,401	)		1,266,030		(43,619	)
Mortgage-backed securities:
Residential		0		0			32,671		(2,675	)		32,671		(2,675	)
Commercial		0		0			2,752		(171	)		2,752		(171	)
Asset-backed securities		17,069		(42	)		283		(2	)		17,352		(44	)
Corporate debt securities		383,677		(9,572	)		31,464		(4,138	)		415,141		(13,710	)
Total debt securities	$	1,821,091	$	(44,501	)	$	170,536	$	(17,506	)	$	1,991,627	$	(62,007	)

Schedule Of Realized Gains (Losses) Related To Investment Securities And Included With Investment Income

	For the three months ended September 30,						For the nine months ended September 30,
	2011			2010			2011			2010
	(in thousands)
Gross realized gains	$	4,894		$	4,649		$	15,742		$	28,402
Gross realized losses		(2,748	)		(339	)		(8,487	)		(16,116	)
Net realized capital gains	$	2,146		$	4,310		$	7,255		$	12,286

Schedule Of the Contractual Maturity Of Debt Securities Available For Sale

	Amortized Cost		Fair Value
	(in thousands)
Due within one year	$	513,749	$	517,127
Due after one year through five years		1,966,077		2,029,429
Due after five years through ten years		2,602,607		2,729,133
Due after ten years		1,793,100		1,940,447
Mortgage and asset-backed securities		2,237,473		2,344,444
Total debt securities	$	9,113,006	$	9,560,580