Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 26, 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)
June 26, 2016
Assets:
Available-for-sale securities	$	5,597		5,597		-		-
Derivatives		63,277		-		63,277		-
Total assets	$	68,874		5,597		63,277		-
Liabilities:
Derivatives	$	13,148		-		13,148		-
Option agreement		27,560		-		-		27,560
Total liabilities	$	40,708		-		13,148		27,560
June 28, 2015
Assets:
Available-for-sale securities	$	5,959		5,959		-		-
Derivatives		105,906		-		105,906		-
Total assets	$	111,865		5,959		105,906		-
Liabilities:
Derivatives	$	2,748		-		2,748		-
Option agreement		25,190		-		-		25,190
Total liabilities	$	27,938		-		2,748		25,190
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		800		150
Balance at end of second quarter	$	(27,560)		(25,190)