CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Income Statement [Abstract]
NET SALES	$ 304,151	$ 214,805	$ 897,951	$ 671,674
Cost of goods sold	255,299	179,764	748,463	560,846
GROSS PROFIT	48,852	35,041	149,488	110,828
Operating Expenses:
Warehouse and delivery	9,165	6,669	26,149	20,154
Selling, general and administrative	15,877	10,805	44,874	33,543
Amortization of intangible assets	3,687	2,354	9,680	5,995
Loss on sale of fixed assets	6	11	47	0
Total operating expenses	28,735	19,839	80,750	59,692
OPERATING INCOME	20,117	15,202	68,738	51,136
Interest expense, net	1,917	1,153	5,198	2,855
Income before income taxes	18,200	14,049	63,540	48,281
Income taxes	6,175	5,089	22,779	18,098
NET INCOME	$ 12,025	$ 8,960	$ 40,761	$ 30,183
BASIC NET INCOME PER COMMON SHARE (in dollars per share)	$ 0.80	$ 0.58	$ 2.72	$ 1.97
DILUTED NET INCOME PER COMMON SHARE (in dollars per share)	$ 0.79	$ 0.58	$ 2.68	$ 1.95
Weighted average shares outstanding - basic (in shares)	15,048	15,342	15,002	15,327
Weighted average shares outstanding - Diluted (in shares)	15,235	15,532	15,182	15,507