Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Provided by (Used in) Operating Activities:
Net Income (Loss)	$ 9,343	$ 16,437	$ (47,583)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by (Used in) Operating Activities
Depreciation and amortization	30,926	29,413	21,458
Asset impairments	6,975	0	0
Impairment of goodwill	0	0	54,273
Stock-based compensation expense	2,438	1,959	2,363
Deferred income taxes	(2,242)	(142)	(6,652)
(Recovery of) provision for doubtful accounts	(77)	78	(3)
Other decrease (increase)	6,223	2,391	(22)
Changes in Assets and Liabilities:
Accounts receivable decrease (increase)	5,468	(1,204)	(3,990)
Inventories decrease (increase)	7,811	6,185	(4,828)
Production cost of contracts increase	(5,101)	(1,324)	(3,451)
Other assets (increase) decrease	(11,192)	6,846	602
Accounts payable increase (decrease)	4,533	(8,097)	(12,323)
Accrued and other liabilities decrease	(9,143)	(5,008)	(2,846)
Net Cash Provided by (Used in) Operating Activities	45,962	47,534	(3,002)
Cash Flows from Investing Activities
Purchases of property and equipment	(12,403)	(15,813)	(14,536)
Acquisitions of businesses, net of cash acquired	0	0	(325,715)
Proceeds from sales of assets	139	31	470
Net Cash Used in Investing Activities	(12,264)	(15,782)	(339,781)
Cash Flows from Financing Activities
Repayment of term loan and other debt	(33,024)	(26,478)	(1,276)
Borrowings of senior notes and term loan	0	0	390,000
Cash dividends paid	0	0	(790)
Debt issue cost paid	(365)	0	(14,025)
Net cash effect of exercise related to stock options	1,968	(186)	55
Net Cash (Used in) Provided by Financing Activities	(31,421)	(26,664)	373,964
Net Increase in Cash and Cash Equivalents	2,277	5,088	31,181
Cash and Cash Equivalents at Beginning of Year	46,537	41,449	10,268
Cash and Cash Equivalents at End of Year	48,814	46,537	41,449
Supplemental Disclosures of Cash Flow Information
Interest paid	27,614	31,505	5,950
Taxes paid	$ 7,835	$ 1,953	$ 4,512