Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock, At Cost [Member]
Beginning Balance at Dec. 28, 2014	$ 195,004		$ 245	$ 110,707	$ 112,521	$ (28,469)
Beginning Balance, Shares at Dec. 28, 2014		22,180,458
Net income	4,892				4,892
Dividends on common stock	(4,428)				(4,428)
Issuance of nonvested share awards			2	(2)
Issuance of nonvested share awards, Shares		152,140
Exercise of share option awards	49			49
Exercise of share option awards, Shares		7,925
Share-based compensation	1,010			1,010
Tax benefit (deficiency) from share-based awards activity	83			83
Forfeiture of nonvested share awards, Shares		(3,965)
Retirement of common stock for payment of withholding tax	(685)		(1)	(684)
Retirement of common stock for payment of withholding tax, Shares		(52,621)
Purchases of treasury stock	(1,193)					(1,193)
Purchases of treasury stock, Shares		(96,273)
Ending Balance at Jun. 28, 2015	194,732		246	111,163	112,985	(29,662)
Ending Balance, shares at Jun. 28, 2015		22,187,664
Beginning Balance at Jan. 03, 2016	198,831		246	112,236	118,998	(32,649)
Beginning Balance, Shares at Jan. 03, 2016		21,917,982
Net income	1,005				1,005
Dividends on common stock	(5,490)				(5,490)
Issuance of nonvested share awards			2	(2)
Issuance of nonvested share awards, Shares		166,980
Exercise of share option awards	7			7
Exercise of share option awards, Shares		1,075
Share-based compensation	1,263			1,263
Tax benefit (deficiency) from share-based awards activity	(222)			(222)
Forfeiture of nonvested share awards, Shares		(4,095)
Retirement of common stock for payment of withholding tax	$ (613)		(1)	(612)
Retirement of common stock for payment of withholding tax, Shares	(53,682)	(53,682)
Purchases of treasury stock	$ (37)					(37)
Purchases of treasury stock, Shares		(3,900)
Ending Balance at Jul. 03, 2016	$ 194,744		$ 247	$ 112,670	$ 114,513	$ (32,686)
Ending Balance, shares at Jul. 03, 2016		22,024,360