Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Cash Flows from Operating Activities
Net Income (Loss)	$ 22,425	$ (9,706)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities
Depreciation and amortization	17,420	20,064
Gain on divestitures	(18,815)	0
Stock-based compensation expense	2,579	2,792
Deferred income taxes	(1,602)	1,599
Excess tax benefits from stock-based compensation	(57)	(516)
Recovery of doubtful accounts	(26)	(11)
Noncash loss on extinguishment of debt	0	4,970
Other	(4,923)	7,180
Changes in Assets and Liabilities:
Accounts receivable	5,777	4,836
Inventories	(15,055)	5,525
Production cost of contracts	(1,437)	(560)
Other assets	7,095	1,614
Accounts payable	19,586	(7,626)
Accrued and other liabilities	(5,453)	(18,076)
Net Cash Provided by Operating Activities	27,514	12,085
Cash Flows from Investing Activities
Purchases of property and equipment	(12,712)	(11,803)
Proceeds from sale of assets	0	289
Insurance recoveries related to property and equipment	0	1,510
Proceeds from divestitures	55,272	0
Net Cash Provided by (Used in) Investing Activities	42,560	(10,004)
Cash Flows from Financing Activities
Borrowings from senior secured revolving credit facility	29,700	65,000
Repayments of senior secured revolving credit facility	(29,700)	(65,000)
Borrowings from term loans	0	275,000
Repayments of senior unsecured notes and term loans	(65,000)	(305,000)
Repayments of other debt	(22)	(17)
Debt issuance costs	0	(4,848)
Excess tax benefits from stock-based compensation	57	516
Net proceeds from issuance of common stock under stock plans	(1,097)	(1,118)
Net Cash Used in Financing Activities	(66,062)	(35,467)
Net Increase (Decrease) in Cash and Cash Equivalents	4,012	(33,386)
Cash and Cash Equivalents at Beginning of Period	5,454	45,627
Cash and Cash Equivalents at End of Period	$ 9,466	$ 12,241