Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Cash Flows from Operating Activities:
Net income	$ 23,551	$ 19,072
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	2,860	2,268
Provision for doubtful accounts	70	88
Benefit for deferred income taxes	(626)	(380)
Provision for non-cash stock compensation	490	247
Changes in assets and liabilities:
Accounts receivable	(5,380)	(12,291)
Inventories	(10,959)	3,398
Prepaids and other current assets	(200)	501
Other assets	(433)	(77)
Accounts payable	(3,400)	(4,552)
Accrued compensation and other liabilities	5,171	2,307
Cash provided by operating activities	11,144	10,581
Cash Flows from Investing Activities:
Property, plant and equipment additions	(7,008)	(2,846)
Cash used in investing activities	(7,008)	(2,846)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	262	121
Other stock related activity	199	527
Purchase and cancellation of common stock	(1,169)	(942)
Cash used in financing activities	(708)	(294)
Net Increase in Cash and Cash Equivalents	3,428	7,441
Cash and Cash Equivalents, Beginning of Period	60,593	27,708
Cash and Cash Equivalents, End of Period	64,021	35,149
Supplemental Cash Flow Information
Cash paid for interest expense	51	50
Cash paid for income taxes	$ 593	$ 2,956