Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 27, 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)
March 27, 2016
Assets:
Available-for-sale securities	$	6,109		6,109		-		-
Derivatives		69,720		-		69,720		-
Total assets	$	75,829		6,109		69,720		-
Liabilities:
Derivatives	$	3,932		-		3,932		-
Option agreement		27,920		-		-		27,920
Total liabilities	$	31,852		-		3,932		27,920
March 29, 2015
Assets:
Available-for-sale securities	$	4,836		4,836		-		-
Derivatives		130,550		-		130,550		-
Total assets	$	135,386		4,836		130,550		-
Liabilities:
Derivatives	$	3,513		-		3,513		-
Option agreement		24,920		-		-		24,920
Total liabilities	$	28,433		-		3,513		24,920
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		440		420
Balance at end of first quarter	$	(27,920)		(24,920)