Investments (Tables)

3 Months Ended

Mar. 26, 2016

Investments, Debt and Equity Securities [Abstract]

Available For Sale Securities

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

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
March 26, 2016
Tax exempt bonds	$	3,515,795		17,502		2,781	3,530,516
Taxable bonds	2,478,317			5,761		3,549	2,480,529
Restricted investments	164,549			—		309	164,240
Equity securities	845,670			79,480		32,904	892,246
	$	7,004,331		102,743		39,543	7,067,531
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 March 26, 2016 and December 26, 2015 are as follows:

	March 26, 2016			December 26, 2015
	Amortized Cost		Fair Value	Amortized Cost	Fair Value
	(Amounts are in thousands)
Due in one year or less	$	1,400,279	1,402,034	1,375,450	1,376,698
Due after one year through five years	4,089,875		4,103,952	3,951,600	3,948,654
Due after five years through ten years	444,990		445,322	161,732	162,999
Due after ten years	58,968		59,737	62,425	63,250
	5,994,112		6,011,045	5,551,207	5,551,601
Restricted investments	164,549		164,240	164,548	163,159
Equity securities	845,670		892,246	836,153	888,174
	$	7,004,331	7,067,531	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 March 26, 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)
March 26, 2016
Tax exempt bonds	$	533,673		2,736	11,743		45	545,416		2,781
Taxable bonds	730,768			2,950	176,955		599	907,723		3,549
Restricted investments	164,240			309	—		—	164,240		309
Equity securities	357,258			25,288	21,831		7,616	379,089		32,904
	$	1,785,939		31,283	210,529		8,260	1,996,468		39,543
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