Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 133,602	$ 106,599	$ 106,049
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	28,391	22,224	18,907
Provision for doubtful accounts	(570)	299	1,221
Provision (benefit) from deferred income tax	(58)	4,676	(4,888)
Provision for non-cash stock compensation	3,460	3,162	2,380
Changes in assets and liabilities:
Accounts receivable	(66,403)	(5,709)	(27,824)
Inventories	(46,835)	(25,147)	24,874
Prepaids and other current assets	(853)	(3,748)	(790)
Other assets	(3,897)	(4,908)	(4,590)
Accounts payable	26,957	3,718	8,662
Accrued compensation and other liabilities	4,318	(6,925)	(2,462)
Cash provided by operating activities	78,112	94,241	121,539
Cash Flows from Investing Activities:
Acquisitions, net of cash acquired	(28,040)	(59,987)
Property, plant and equipment additions	(26,106)	(24,450)	(20,059)
Purchase of equity investments	(5,000)	(10,000)	(6,195)
Cash used in investing activities	(59,146)	(94,437)	(26,254)
Cash Flows from Financing Activities:
Contingent consideration payments	(2,036)
Other stock related activity	249	(1,173)	(145)
Proceeds from exercise of stock options	201	31
Purchase and cancellation of common stock	(45,352)	(76,129)	(24,678)
Cash used in financing activities	(46,938)	(77,271)	(24,823)
Effect of exchange rate changes on Cash and Cash Equivalents	(261)	37
Net Increase (Decrease) in Cash and Cash Equivalents	(28,233)	(77,430)	70,462
Cash and Cash Equivalents, Beginning of Period	71,691	149,121	78,659
Cash and Cash Equivalents, End of Period	43,458	71,691	149,121
Supplemental Cash Flow Information
Cash paid for interest expense	250	291	266
Cash paid for income taxes	$ 30,453	$ 74,647	$ 62,348