Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net Income	$ 3,707	$ 2,390
Adjustments to Reconcile Net Income to Net Cash Used in Operating Activities
Depreciation and amortization	7,033	6,804
Stock-based compensation expense	693	566
Deferred income tax benefit	(2,040)	(844)
Income tax benefit from stock-based compensation	100	114
Recovery of doubtful accounts	(157)	(36)
Other decrease	246	408
Changes in Assets and Liabilities
Accounts receivable decrease	1,066	1,487
Unbilled receivables (increase) decrease	212	(27)
Inventories increase	(1,084)	(2,789)
Production cost of contracts increase	(2,559)	(1,340)
Other assets decrease	1,244	3,913
Accounts payable decrease	(2,097)	(3,520)
Accrued and other liabilities decrease	(12,486)	(11,919)
Net Cash Used in Operating Activities	(6,122)	(4,793)
Cash Flows from Investing Activities
Purchases of property and equipment	(2,612)	(4,917)
Proceeds from the sales of assets	5	3
Net Cash Used in Investing Activities	(2,607)	(4,914)
Cash Flows from Financing Activities
Repayments of term loan and other debt	(7,506)	(491)
Deferred financing cost paid	(181)
Net cash effect of exercise related to stock options	(127)	(39)
Net Cash Used in Financing Activities	(7,814)	(530)
Net Decrease in Cash and Cash Equivalents	(16,543)	(10,237)
Cash and Cash Equivalents at Beginning of Period	46,537	41,449
Cash and Cash Equivalents at End of Period	$ 29,994	$ 31,212