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. 25, 2012	$ 24	$ 119,610		$ 58,267	$ 177,901
Balance, shares at Dec. 25, 2012	23,794,667
Comprehensive income				3,569	3,569
Share-based compensation costs		228			228
Contribution by shareholder (see Note 5)		1,779			1,779
Balance at Mar. 19, 2013	24	121,617		61,836	183,477
Balance, shares at Mar. 19, 2013	23,794,667
Balance at Dec. 31, 2013	24	129,961	(3,681)	70,479	196,783
Balance, shares at Dec. 31, 2013	23,626,642
Comprehensive income				4,522	4,522
Share-based compensation costs		573			573
Stock option exercises, including tax effects		48			48
Stock option exercises, including tax effects, shares	3,000				3,000
Treasury stock at cost: 196,500 at December 31, 2013 and March 25, 2014 (unaudited), respectively					(3,681)
Balance at Mar. 25, 2014	$ 24	$ 130,582	$ (3,681)	$ 75,001	$ 201,926
Balance, shares at Mar. 25, 2014	23,629,642