Consolidated Statement Of Changes In Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 28, 2010	$ 18	$ 51,597		$ 35,540	$ 87,155
Balance, shares at Dec. 28, 2010	17,994,667
Comprehensive income				8,973	8,973
Cash distribution		(357)			(357)
Equity-based compensation		101			101
Balance at Dec. 27, 2011	18	51,341		44,513	95,872
Balance, shares at Dec. 27, 2011	17,994,667
Comprehensive income				13,754	13,754
Share-based compensation costs		378			378
Issuance of common stock for initial public offering net of fees and issuance costs	6	66,451			66,457
Issuance of common stock for initial public offering net of fees and issuance costs, shares	5,800,000
Contribution by shareholder (see Note 5)		1,440			1,440
Balance at Dec. 25, 2012	24	119,610		58,267	177,901
Balance, shares at Dec. 25, 2012	23,794,667
Comprehensive income				12,212	12,212
Share-based compensation costs		1,689			1,689
Stock option exercises, including tax effects		428			428
Stock option exercises, including tax effects, shares	28,475				28,475
Treasury stock at cost: 0 and 196,500 at December 25, 2012 and December 31, 2013, respectively			(3,681)		(3,681)
Treasury stock purchases, shares	(196,500)				(196,500)
Contribution by shareholder (see Note 5)		8,234			8,234
Balance at Dec. 31, 2013	$ 24	$ 129,961	$ (3,681)	$ 70,479	$ 196,783
Balance, shares at Dec. 31, 2013	23,626,642