Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 25, 2016

Fair Value of Financial Instruments (Thousands of Dollars) [Abstract]

Fair Value Hierarchy

	Fair Value Measurements Using:
			Quoted
			Prices in
			Active
			Markets		Significant
			for		Other		Significant
			Identical		Observable		Unobservable
	Fair		Assets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
September 25, 2016
Assets:
Available-for-sale securities	$	4,986		4,986		-		-
Derivatives		39,115		-		39,115		-
Total assets	$	44,101		4,986		39,115		-
Liabilities:
Derivatives	$	19,390		-		19,390		-
Option agreement		27,460		-		-		27,460
Total liabilities	$	46,850		-		19,390		27,460
September 27, 2015
Assets:
Available-for-sale securities	$	4,029		4,029		-		-
Derivatives		119,123		-		119,123		-
Total assets	$	123,152		4,029		119,123		-
Liabilities:
Derivatives	$	605		-		605		-
Option agreement		24,780		-		-		24,780
Total liabilities	$	25,385		-		605		24,780
December 27, 2015
Assets:
Available-for-sale securities	$	3,476		3,476		-		-
Derivatives		107,634		-		107,634		-
Total assets	$	111,110		3,476		107,634		-
Liabilities:
Derivatives	$	1,240		-		1,240		-
Option agreement		28,360		-		-		28,360
Total Liabilities	$	29,600		-		1,240		28,360

Reconciliation of Level 3 Fair Value

	2016		2015
Balance at beginning of year	$	(28,360)		(25,340)
Gain from change in fair value		900		560
Balance at end of third quarter	$	(27,460)		(24,780)