Fair Value of Financial Instruments (Tables)

3 Months Ended

Apr. 01, 2018

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)
April 1, 2018
Assets:
Available-for-sale securities	$	2,941		2,941		-		-
Derivatives		2,960		-		2,960		-
Total assets	$	5,901		2,941		2,960		-
Liabilities:
Derivatives	$	39,428		-		39,428		-
Option agreement		23,665		-		-		23,665
Total liabilities	$	63,093		-		39,428		23,665
April 2, 2017
Assets:
Available-for-sale securities	$	3,687		3,687		-		-
Derivatives		56,017		-		56,017		-
Total assets	$	59,704		3,687		56,017		-
Liabilities:
Derivatives	$	20,595		-		20,595		-
Option agreement		28,710		-		-		28,710
Total liabilities	$	49,305		-		20,595		28,710
December 31, 2017
Assets:
Available-for-sale securities	$	3,126		3,126		-		-
Derivatives		12,226		-		12,226		-
Total assets	$	15,352		3,126		12,226		-
Liabilities:
Derivatives	$	23,051		-		23,051		-
Option agreement		23,980		-		-		23,980
Total Liabilities	$	47,031		-		23,051		23,980

Reconciliation of Level 3 Fair Value

	2018		2017
Balance at beginning of year	$	(23,980)		(28,770)
Gain from change in fair value		315		60
Balance at end of first quarter	$	(23,665)		(28,710)