Investments (Tables)

9 Months Ended

Sep. 24, 2016

Investments, Debt and Equity Securities [Abstract]

Available For Sale Securities

Following is a summary of AFS securities as of September 24, 2016 and December 26, 2015:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
September 24, 2016
Tax exempt bonds	$	3,174,197		13,958		1,945	3,186,210
Taxable bonds	2,620,138			8,229		3,172	2,625,195
Restricted investments	164,549			1,851		—	166,400
Equity securities	965,593			121,283		14,100	1,072,776
	$	6,924,477		145,321		19,217	7,050,581
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 September 24, 2016 and December 26, 2015 are as follows:

	September 24, 2016			December 26, 2015
	Amortized Cost		Fair Value	Amortized Cost	Fair Value
	(Amounts are in thousands)
Due in one year or less	$	1,587,866	1,588,737	1,375,450	1,376,698
Due after one year through five years	3,585,503		3,600,438	3,951,600	3,948,654
Due after five years through ten years	604,225		604,723	161,732	162,999
Due after ten years	16,741		17,507	62,425	63,250
	5,794,335		5,811,405	5,551,207	5,551,601
Restricted investments	164,549		166,400	164,548	163,159
Equity securities	965,593		1,072,776	836,153	888,174
	$	6,924,477	7,050,581	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 September 24, 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)
September 24, 2016
Tax exempt bonds	$	817,019		1,927	83		18	817,102		1,945
Taxable bonds	956,713			2,297	51,490		875	1,008,203		3,172
Equity securities	35,651			3,459	63,190		10,641	98,841		14,100
	$	1,809,383		7,683	114,763		11,534	1,924,146		19,217
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