Marketable Securities (Tables)

3 Months Ended

Apr. 01, 2017

Marketable Securities [Abstract]

Marketable securities [Table Text Block]

Marketable securities, as of April 1, 2017 and December 31, 2016, consisted of:

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
April 1, 2017	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities	$	1,198	$	7,804	$	-	$	9,002
Level 2
Municipal bonds		54,773		784		(280)		55,277
	$	55,971	$	8,588	$	(280)	$	64,279

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
December 31, 2016	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities	$	1,198	$	8,162	$	-	$	9,360
Level 2
Municipal bonds		57,739		531		(459)		57,811
	$	58,937	$	8,693	$	(459)	$	67,171

Maturities of marketable securities classified as available-for-sale [Table Text Block]

Maturities of marketable securities classified as available-for-sale at April 1, 2017, were as follows:

		Amortized		Fair
(dollars in thousands)		Cost		Value
Available-for-sale:
Due within one year	$	7,623	$	7,667
Due after one year through five years		24,811		25,161
Due after five years through ten years		22,339		22,449
Equity securities		1,198		9,002
	$	55,971	$	64,279