Stock Compensation Plans (Details 3) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding at beginning of year	187,625	344,375	639,950
Options, Issued during year	20,000	0	25,000
Options, Canceled or expired	(39,250)	(500)	(19,000)
Options, Exercised during year	(96,000)	(156,250)	(301,575)
Options, Outstanding at end of year	72,375	187,625	344,375
Options, Exercisable at end of year	41,125	133,250	158,875
Weighted-average fair value of options granted during the year	$ 2.52	$ 0	$ 3.06
Weighted Average Exercise Price, Issued during year	14.39	0	11.86
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value, Outstanding at beginning of year	11.86	11.86	6.07
Weighted Average Exercise Price, Exercised during year	6.07	11.86	6.07
Weighted Average Grant Date Fair Value, Outstanding at end of year	14.39	11.86	11.86
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value, Outstanding at beginning of year	5.28	2.56	0.64
Weighted Average Exercise Price, Exercised during year	5.28	2.56	0.64
Weighted Average Grant Date Fair Value, Outstanding at end of year	$ 5.28	$ 5.28	$ 2.56