Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014
Cash Flows from Operating Activities
Net Income (Loss)	$ (191)	$ 11,778
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by (Used in) Operating Activities
Depreciation and amortization	13,428	15,125
Stock-based compensation expense	2,461	1,288
Deferred income taxes	1,577	998
Excess tax benefits from stock-based compensation	(509)	(61)
Recovery of doubtful accounts	(28)	(235)
Noncash loss on extinguishment of debt	2,842	0
Other	(1,663)	31
Changes in Assets and Liabilities:
Accounts receivable	(106)	(13,066)
Inventories	4,828	(1,694)
Production cost of contracts	1,348	(1,734)
Other assets	7,942	6,563
Accounts payable	(4,078)	(4,363)
Accrued and other liabilities	(10,295)	835
Net Cash Provided by Operating Activities	17,556	15,465
Cash Flows from Investing Activities
Purchases of property and equipment	(7,782)	(5,997)
Proceeds from sale of assets	279	51
Insurance recoveries related to property and equipment	1,510	0
Net Cash Used in Investing Activities	(5,993)	(5,946)
Cash Flows from Financing Activities
Proceeds from senior secured revolving credit facility	65,000	0
Repayment of term loan and other debt	(90,013)	(15,012)
Debt issuance costs	(4,738)	0
Excess tax benefits from stock-based compensation	509	61
Net proceeds from issuance of common stock under stock plans	(1,106)	369
Net Cash Used in Financing Activities	(30,348)	(14,582)
Net Decrease in Cash and Cash Equivalents	(18,785)	(5,063)
Cash and Cash Equivalents at Beginning of Period	45,627	48,814
Cash and Cash Equivalents at End of Period	26,842	43,751
Supplemental Disclosures of Cash Flow Information
Interest paid	12,400	1,440
Taxes paid	150	3,249
Non-cash activities:
Purchases of property and equipment not paid	$ 1,871	$ 722