Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
Net Cash Provided by Operating Activities:
Net Income	$ 11,101	$ 9,211
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities
Depreciation and amortization	15,125	14,173
Stock-based compensation expense	1,288	805
Deferred income taxes	595	1,615
Recovery of doubtful accounts	(235)	(34)
Other	1,111	809
Changes in Assets and Liabilities:
Accounts receivable	(13,066)	(8,243)
Inventories	(1,694)	(588)
Production cost of contracts	(1,734)	(1,843)
Other assets	6,563	(3,473)
Accounts payable	(4,363)	(1,714)
Accrued and other liabilities	835	(3,775)
Net Cash Provided by Operating Activities	15,526	6,943
Cash Flows from Investing Activities
Purchases of property and equipment	(5,997)	(5,253)
Proceeds from sale of assets	51	111
Net Cash Used in Investing Activities	(5,946)	(5,142)
Cash Flows from Financing Activities
Repayment of term loan and other debt	(15,012)	(15,012)
Debt issue cost paid	0	(181)
Net proceeds from issuance of common stock under stock plans	369	365
Net Cash Used in Financing Activities	(14,643)	(14,828)
Net Decrease in Cash and Cash Equivalents	(5,063)	(13,027)
Cash and Cash Equivalents at Beginning of Period	48,814	46,537
Cash and Cash Equivalents at End of Period	43,751	33,510
Supplemental Disclosures of Cash Flow Information
Interest paid	1,440,025	1,950,600
Taxes paid	3,249,400	1,743,329
Non-cash activities:
Purchases of property and equipment not paid	$ 721,840	$ 0