Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Cash Flows from Operating Activities:
Net income	$ 106,599	$ 106,049	$ 92,329
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	22,224	18,907	16,186
Provision for doubtful accounts	299	1,221	3,260
Provision (benefit) from deferred income tax	4,676	(4,888)	(5,106)
Provision for non-cash stock compensation	3,162	2,380	882
Changes in assets and liabilities:
Accounts receivable	(5,709)	(27,824)	(1,148)
Inventories	(25,147)	24,874	(20,202)
Prepaids and other current assets	(3,748)	(790)	821
Other assets	(4,908)	(4,590)	(3,962)
Accounts payable	3,718	8,662	5,389
Accrued compensation and other liabilities	(6,925)	(2,462)	3,611
Cash provided by operating activities	94,241	121,539	92,060
Cash Flows from Investing Activities:
Property, plant and equipment additions	(24,450)	(20,059)	(21,688)
Acquisition, net of cash acquired	(59,987)
Purchase of equity investment	(10,000)	(6,195)	(2,133)
Cash used in investing activities	(94,437)	(26,254)	(23,821)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	31		93
Other stock related activity	(1,173)	(145)	(5)
Purchase and cancellation of common stock	(76,129)	(24,678)	(37,324)
Cash used in financing activities	(77,271)	(24,823)	(37,236)
Effect of exchange rate changes on Cash and Cash Equivalents	37
Net Increase (Decrease) in Cash and Cash Equivalents	(77,430)	70,462	31,003
Cash and Cash Equivalents, Beginning of Period	149,121	78,659	47,656
Cash and Cash Equivalents, End of Period	71,691	149,121	78,659
Supplemental Cash Flow Information
Cash paid for interest expense	291	266	281
Cash paid for income taxes	$ 74,647	$ 62,348	$ 57,151