Investments (Tables)

3 Months Ended

Mar. 29, 2014

Investments, Debt and Equity Securities [Abstract]

Available For Sale Securities

Following is a summary of AFS securities as of March 29, 2014 and December 28, 2013:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
March 29, 2014
Tax exempt bonds	$	3,530,137		24,465		7,346	3,547,256
Taxable bonds	1,692,999			8,051		2,778	1,698,272
Restricted investments	170,000			431		—	170,431
Equity securities	915,071			149,742		4,170	1,060,643
	$	6,308,207		182,689		14,294	6,476,602
December 28, 2013
Tax exempt bonds	$	3,430,028		25,588		9,917	3,445,699
Taxable bonds	1,445,901			7,641		3,863	1,449,679
Restricted investments	170,000			—		86	169,914
Equity securities	790,975			139,119		3,900	926,194
	$	5,836,904		172,348		17,766	5,991,486

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 March 29, 2014 and December 28, 2013 are as follows:

	March 29, 2014			December 28, 2013
	Amortized Cost		Fair Value	Amortized Cost	Fair Value
	(Amounts are in thousands)
Due in one year or less	$	833,361	837,254	824,780	829,559
Due after one year through five years	3,975,875		3,995,357	3,590,615	3,609,115
Due after five years through ten years	275,075		271,311	295,407	288,421
Due after ten years	138,825		141,606	165,127	168,283
	5,223,136		5,245,528	4,875,929	4,895,378
Restricted investments	170,000		170,431	170,000	169,914
Equity securities	915,071		1,060,643	790,975	926,194
	$	6,308,207	6,476,602	5,836,904	5,991,486

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 March 29, 2014 and December 28, 2013:

	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)
March 29, 2014
Tax exempt bonds	$	678,263		5,019	79,159		2,327	757,422		7,346
Taxable bonds	536,084			2,052	42,793		726	578,877		2,778
Equity securities	83,014			3,851	2,182		319	85,196		4,170
Total temporarily impaired AFS securities	$	1,297,361		10,922	124,134		3,372	1,421,495		14,294
December 28, 2013
Tax exempt bonds	$	502,304		6,710	106,985		3,207	609,289		9,917
Taxable bonds	535,233			3,347	19,367		516	554,600		3,863
Restricted investments	169,914			86	—		—	169,914		86
Equity securities	31,400			3,499	3,152		401	34,552		3,900
Total temporarily impaired AFS securities	$	1,238,851		13,642	129,504		4,124	1,368,355		17,766