Accumulated Other Comprehensive Earnings (Losses) (Tables)

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Earnings (Losses) [Table Text Block]

A reconciliation of the changes in accumulated other comprehensive earnings (losses) net of income taxes for the three months ended March 27, 2021 and March 28, 2020 is as follows:

	Investments			Postretirement Benefit		Accumulated Other Comprehensive Earnings (Losses)
		(Amounts are in thousands)
2021
Balances at December 26, 2020		$	223,904		(22,953)		200,951
Unrealized loss on debt securities		(103,548)			—		(103,548)
Net realized gain on debt securities reclassified to investment income		(5,583)			—		(5,583)
Adjustment to postretirement benefit obligation		—			1,379		1,379
Net other comprehensive (losses) earnings		(109,131)			1,379		(107,752)
Balances at March 27, 2021		$	114,773		(21,574)		93,199
2020
Balances at December 28, 2019		$	98,506		(17,217)		81,289
Unrealized loss on debt securities		(137,583)			—		(137,583)
Net realized gain on debt securities reclassified to investment income		(1,726)			—		(1,726)
Adjustment to postretirement benefit obligation		—			815		815
Net other comprehensive (losses) earnings		(139,309)			815		(138,494)
Balances at March 28, 2020		$	(40,803)		(16,402)		(57,205)