Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Revenues	$ 178,799	$ 156,493	$ 484,076	$ 441,074
Costs and expenses:
Operating	116,157	100,861	323,229	290,225
Selling	28,103	26,147	76,774	72,546
General and administrative	11,315	10,101	33,322	30,922
Depreciation and amortization	10,037	9,411	29,461	27,463
(Gain) loss on sale of assets, net	(155)	(107)	(399)	(11)
Total costs and expenses	165,457	146,413	462,387	421,145
Income from operations	13,342	10,080	21,689	19,929
Other income (expense):
Interest expense	(1,041)	(827)	(2,915)	(1,868)
Interest income	14	15	28	38
Other, net	(1,043)	(957)	(2,367)	(2,074)
Income before income taxes	11,272	8,311	16,435	16,025
Income taxes	4,310	3,470	6,360	6,586
Net income	$ 6,962	$ 4,841	$ 10,075	$ 9,439
Net income per share:
Basic	$ 0.50	$ 0.33	$ 0.72	$ 0.65
Diluted	$ 0.48	$ 0.32	$ 0.69	$ 0.62
Weighted-average shares outstanding:
Basic	13,993	14,504	14,059	14,614
Diluted	14,582	14,993	14,602	15,131
Dividends declared per share	$ 0.043	$ 0.043	$ 0.128	$ 0.128