Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Cash Flows from Operating Activities:
Net income	$ 70,542	$ 71,331
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	11,739	9,001
Provision for doubtful accounts	85	219
Benefit for deferred income taxes	(2,462)	(434)
Provision for non-cash stock compensation	752	1,510
Changes in assets and liabilities:
Accounts receivable	6,693	(8,662)
Inventories	(21,727)	(12,051)
Prepaids and other current assets	(397)	(797)
Other assets	(4,652)	(4,764)
Accounts payable	377	(9,168)
Accrued compensation and other liabilities	(3,467)	1,221
Cash provided by operating activities	57,483	47,406
Cash Flows from Investing Activities:
Property, plant and equipment additions	(16,534)	(22,992)
Purchase of equity investment	(2,000)
Cash used in investing activities	(18,534)	(22,992)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	16	463
Other stock related activity	34	81
Purchase and cancellation of common stock	(7,334)	(41,341)
Cash used in financing activities	(7,284)	(40,797)
Net Increase (Decrease) in Cash and Cash Equivalents	31,665	(16,383)
Cash and Cash Equivalents, Beginning of Period	47,656	60,593
Cash and Cash Equivalents, End of Period	79,321	44,210
Supplemental Cash Flow Information
Cash paid for interest expense	211	176
Cash paid for income taxes	$ 41,709	$ 38,192