Investments (Tables)

6 Months Ended

Jun. 30, 2012

Available For Sale Securities

Following is a summary of AFS securities as of June 30, 2012 and December 31, 2011:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
June 30, 2012
Tax exempt bonds	$	2,860,946		37,717		975		2,897,688
Taxable bonds		1,330,983		19,120		492		1,349,611
Restricted investments		170,000		---		776		169,224
Equity securities		362,208		44,044		16,721		389,531
	$	4,724,137		100,881		18,964		4,806,054
December 31, 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

Amortized Cost and Fair Value of Available For Sale Securities by Expected Maturity

The amortized cost and fair value of AFS securities by expected maturity as of June 30, 2012 and December 31, 2011 are as follows:

	June 30, 2012				December 31, 2011
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(Amounts are in thousands)
Due in one year or less	$	647,811		650,967		445,296		447,972
Due after one year through five years		2,722,156		2,757,828		2,492,484		2,524,020
Due after five years through ten years		469,594		476,333		348,427		356,808
Due after ten years		352,368		362,171		428,064		440,079
		4,191,929		4,247,299		3,714,271		3,768,879
Restricted investments		170,000		169,224		170,000		166,981
Equity securities		362,208		389,531		296,105		317,395
	$	4,724,137		4,806,054		4,180,376		4,253,255

Temporarily Impaired Available For Sale Securities by Time Period Impaired

Following is a summary of temporarily impaired AFS securities by the time period impaired as of June 30, 2012 and December 31, 2011:

	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)
June 30, 2012
Tax exempt bonds		$257,992	975		---	---		257,992	975
Taxable bonds		175,903	492		---	---		175,903	492
Restricted investments		169,224	776		---	---		169,224	776
Equity securities		107,847	14,087		12,395	2,634		120,242	16,721
Total temporarily impaired AFS securities		$710,966	16,330		12,395	2,634		723,361	18,964
December 31, 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