CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 40,761	$ 30,183
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,994	5,796
Amortization of intangible assets	9,680	5,995
Stock-based compensation expense	4,798	3,426
Deferred financing cost amortization	453	345
Deferred income taxes	(1,931)	(2,679)
Loss on sale of fixed assets	47	0
Other non-cash items	296	248
Change in operating assets and liabilities, net of effects of acquisitions:
Trade receivables	(27,207)	(17,648)
Inventories	(9,683)	(3,695)
Prepaid expenses and other	1,387	3,044
Accounts payable and accrued liabilities	23,376	580
Payments on deferred compensation obligations	(238)	(255)
Net cash provided by operating activities	49,733	25,340
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(10,866)	(4,731)
Proceeds from sale of property and equipment	241	100
Business acquisitions	(112,080)	(139,168)
Other investing activities	(21)	651
Net cash used in investing activities	(122,726)	(143,148)
CASH FLOWS FROM FINANCING ACTIVITIES
Term debt borrowings	29,002	75,000
Term debt repayments	(5,358)	(2,679)
Borrowings on revolver	262,583	231,502
Repayments on revolver	(209,856)	(180,056)
Payment of deferred financing costs	(380)	(1,887)
Stock repurchases under buyback program	(4,667)	(5,650)
Realization of excess tax benefit on stock-based compensation	1,256	1,080
Proceeds from exercise of stock options, including tax benefit	1,865	1,861
Other financing activities	(62)	(76)
Net cash provided by financing activities	74,383	119,095
Increase in cash and cash equivalents	1,390	1,287
Cash and cash equivalents at beginning of year	87	123
Cash and cash equivalents at end of period	$ 1,477	$ 1,410