Investments (Tables)

6 Months Ended

Jun. 25, 2016

Investments, Debt and Equity Securities [Abstract]

Available For Sale Securities

Following is a summary of AFS securities as of June 25, 2016 and December 26, 2015:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
June 25, 2016
Tax exempt bonds	$	3,442,442		26,723		559	3,468,606
Taxable bonds	2,393,982			12,471		1,141	2,405,312
Restricted investments	164,549			1,389		—	165,938
Equity securities	898,622			87,844		29,205	957,261
	$	6,899,595		128,427		30,905	6,997,117
December 26, 2015
Tax exempt bonds	$	3,336,841		12,038		2,737	3,346,142
Taxable bonds	2,214,366			1,492		10,399	2,205,459
Restricted investments	164,548			—		1,389	163,159
Equity securities	836,153			78,378		26,357	888,174
	$	6,551,908		91,908		40,882	6,602,934

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 25, 2016 and December 26, 2015 are as follows:

	June 25, 2016			December 26, 2015
	Amortized Cost		Fair Value	Amortized Cost	Fair Value
	(Amounts are in thousands)
Due in one year or less	$	1,462,861	1,464,791	1,375,450	1,376,698
Due after one year through five years	3,972,098		4,002,436	3,951,600	3,948,654
Due after five years through ten years	381,423		385,783	161,732	162,999
Due after ten years	20,042		20,908	62,425	63,250
	5,836,424		5,873,918	5,551,207	5,551,601
Restricted investments	164,549		165,938	164,548	163,159
Equity securities	898,622		957,261	836,153	888,174
	$	6,899,595	6,997,117	6,551,908	6,602,934

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 25, 2016 and December 26, 2015:

	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 25, 2016
Tax exempt bonds	$	90,715		532	11,641		27	102,356		559
Taxable bonds	140,993			153	132,257		988	273,250		1,141
Equity securities	357,222			18,644	33,989		10,561	391,211		29,205
	$	588,930		19,329	177,887		11,576	766,817		30,905
December 26, 2015
Tax exempt bonds	$	890,907		2,264	63,474		473	954,381		2,737
Taxable bonds	1,676,719			9,988	70,309		411	1,747,028		10,399
Restricted investments	163,159			1,389	—		—	163,159		1,389
Equity securities	274,517			20,561	16,112		5,796	290,629		26,357
	$	3,005,302		34,202	149,895		6,680	3,155,197		40,882