Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016
Cash Flows from Operating Activities:
Net income	$ 57,624	$ 50,653
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	10,192	9,179
Provision for doubtful accounts	150	1,071
Benefit for deferred income taxes	(2,666)	(85)
Provision for non-cash stock compensation	1,478	1,048
Changes in assets and liabilities:
Accounts receivable	(38)	(13,932)
Inventories	(29,690)	14,753
Prepaids and other current assets	(1,932)	(1,172)
Other assets	(2,503)	(3,230)
Accounts payable	18,158	(11,408)
Accrued compensation and other liabilities	(8,850)	(10,333)
Cash provided by operating activities	41,923	36,544
Cash Flows from Investing Activities:
Property, plant and equipment additions	(11,932)	(10,118)
Purchase of investments	(13,127)
Cash used in investing activities	(25,059)	(10,118)
Cash Flows from Financing Activities:
Other stock related activity	(1,043)	(97)
Purchase and cancellation of common stock	(35,734)	(17,091)
Cash used in financing activities	(36,777)	(17,188)
Net Increase in Cash and Cash Equivalents	(19,913)	9,238
Cash and Cash Equivalents, Beginning of Period	149,121	78,659
Cash and Cash Equivalents, End of Period	129,208	87,897
Supplemental Cash Flow Information
Cash paid for interest expense	129	133
Cash paid for income taxes	$ 38,679	$ 32,053