Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014
Cash Flows from Operating Activities
Net (Loss) Income	$ (9,706)	$ 14,711
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by (Used in) Operating Activities
Depreciation and amortization	20,064	21,829
Stock-based compensation expense	2,792	2,520
Deferred income taxes	1,599	2,073
Excess tax benefits from stock-based compensation	(516)	(139)
Recovery of doubtful accounts	(11)	(214)
Noncash loss on extinguishment of debt	4,970	0
Other	7,180	(149)
Changes in Assets and Liabilities:
Accounts receivable	4,836	(12,273)
Inventories	5,525	(4,961)
Production cost of contracts	(560)	(1,408)
Other assets	1,614	6,633
Accounts payable	(7,626)	(2,447)
Accrued and other liabilities	(18,076)	(5,400)
Net Cash Provided by Operating Activities	12,085	20,775
Cash Flows from Investing Activities
Purchases of property and equipment	(11,803)	(9,329)
Proceeds from sale of assets	289	83
Insurance recoveries related to property and equipment	1,510	1,600
Net Cash Used in Investing Activities	(10,004)	(7,646)
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	65,000	0
Repayment of senior secured revolving credit facility	(65,000)	0
Borrowings from term loan	275,000	0
Repayments of senior unsecured notes and term loans	(305,000)	(22,500)
Repayments of other debt	(17)	(19)
Debt issuance costs	(4,848)	0
Excess tax benefits from stock-based compensation	516	139
Net proceeds from issuance of common stock under stock plans	(1,118)	1,289
Net Cash Used in Financing Activities	(35,467)	(21,091)
Net (Decrease) Increase in Cash and Cash Equivalents	(33,386)	(7,962)
Cash and Cash Equivalents at Beginning of Period	45,627	48,814
Cash and Cash Equivalents at End of Period	$ 12,241	$ 40,852