Investments (Tables)

6 Months Ended

Jun. 25, 2022

Investments, Debt and Equity Securities [Abstract]

Available For Sale Debt Securities [Table Text Block]

Following is a summary of debt securities as of June 25, 2022 and December 25, 2021:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in thousands)
June 25, 2022
Taxable bonds	$	9,683,628		597		727,727	8,956,498
Tax exempt bonds	204,333			26		211	204,148
Restricted investments	155,281			421		1,956	153,746
	$	10,043,242		1,044		729,894	9,314,392
December 25, 2021
Taxable bonds	$	9,644,692		108,697		108,906	9,644,483
Tax exempt bonds	268,899			2,351		—	271,250
Restricted investments	170,769			7,629		359	178,039
	$	10,084,360		118,677		109,265	10,093,772

Amortized Cost and Fair Value of Available For Sale Debt Securities by Expected Maturity [Table Text Block]

The cost and fair value of debt securities by expected maturity as of June 25, 2022 and December 25, 2021 are as follows:

	June 25, 2022				December 25, 2021
	Cost		Fair Value		Cost		Fair Value
	(Amounts are in thousands)
Due in one year or less	$	738,303		737,709		875,740	883,066
Due after one year through five years	7,333,651			6,836,664		6,353,221	6,403,573
Due after five years through ten years	1,968,718			1,737,443		2,852,531	2,804,131
Due after ten years	2,570			2,576		2,868	3,002
	$	10,043,242		9,314,392		10,084,360	10,093,772

Available For Sale Debt Securities in an Unrealized Loss Position by Time Period Impaired [Table Text Block]

Following is a summary of debt securities with other unrealized losses by the time period impaired as of June 25, 2022 and December 25, 2021:

	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, 2022
Taxable bonds	$	6,896,368		509,148	1,763,638		218,579	8,660,006		727,727
Tax exempt bonds	167,063			211	—		—	167,063		211
Restricted investments	46,504			955	8,742		1,001	55,246		1,956
	$	7,109,935		510,314	1,772,380		219,580	8,882,315		729,894
December 25, 2021
Taxable bonds	$	4,225,323		72,862	1,131,942		36,044	5,357,265		108,906
Restricted investments	17,115			359	—		—	17,115		359
	$	4,242,438		73,221	1,131,942		36,044	5,374,380		109,265

Investment Income (Loss) [Table Text Block]

Following is a summary of investment income (loss) for the three and six months ended June 25, 2022 and June 26, 2021:

		Three Months Ended					Six Months Ended
	June 25, 2022			June 26, 2021		June 25, 2022		June 26, 2021
	(Amounts are in thousands)
Interest and dividend income		$	54,764		45,956		111,518		94,626
Net realized gain on investments		110			16,496		1,218		23,985
		54,874			62,452		112,736		118,611
Fair value adjustment, due to net unrealized (loss) gain, on equity securities held at end of period		(358,122)			128,961		(938,960)		913,811
Net gain on sale of equity securities previously recognized through fair value adjustment		—			(9,441)		—		(9,441)
		$	(303,248)		181,972		(826,224)		1,022,981