Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Cash Flows from Operating Activities
Net Income	$ 9,211	$ 7,897
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and amortization	14,173	13,807
Stock-based compensation expense	805	1,042
Deferred income tax provision (benefit)	1,615	(3,957)
Income tax benefit from stock-based compensation	567	324
Provision for (recovery of) doubtful accounts	(34)	69
Other	809	1,502
Changes in Assets and Liabilities
Accounts receivable increase	(8,243)	(4,174)
Unbilled receivables increase	(537)	(1,016)
Inventories increase	(588)	(4,800)
Production cost of contracts increase	(1,843)	(1,522)
Other assets (increase) decrease	(2,936)	4,710
Accounts payable decrease	(1,714)	(4,876)
Accrued and other liabilities decrease	(4,342)	(3,293)
Net Cash Provided by Operating Activities	6,943	5,713
Cash Flows from Investing Activities
Purchases of property and equipment	(5,253)	(8,763)
Proceeds from the sales of assets	111	11
Net Cash Used in Investing Activities	(5,142)	(8,752)
Cash Flows from Financing Activities
Repayments of term loan and other debt	(15,012)	(973)
Net cash effect of exercise related to stock options	365	(186)
Deferred financing cost paid	(181)
Net Cash Used in Financing Activities	(14,828)	(1,159)
Net Decrease in Cash and Cash Equivalents	(13,027)	(4,198)
Cash and Cash Equivalents at Beginning of Period	46,537	41,449
Cash and Cash Equivalents at End of Period	$ 33,510	$ 37,251