Investments (Tables)

6 Months Ended

Jun. 25, 2016

Investments [Abstract]

Marketable securities [Table Text Block]

Marketable securities, as of June 25, 2016 and December 26, 2015, consisted of:

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
June 25, 2016	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities	$	1,198	$	8,102	$	-	$	9,300
Level 2
Municipal bonds		67,123		1,968		(11)		69,080
	$	68,321	$	10,070	$	(11)	$	78,380

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized		Fair
December 26, 2015	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities	$	1,198	$	6,682	$	-	$	7,880
Level 2
Municipal bonds		82,347		1,468		(66)		83,749
	$	83,545	$	8,150	$	(66)	$	91,629

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

Maturities of marketable securities classified as available-for-sale at June 25, 2016, were as follows:

		Amortized		Fair
(dollars in thousands)		Cost		Value
Available-for-sale:
Due within one year	$	6,142	$	6,188
Due after one year through five years		44,922		45,824
Due after five years through ten years		16,059		17,068
Equity securities		1,198		9,300
	$	68,321	$	78,380