Consolidated Condensed Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
Cash Flows from Operating Activities:
Net Income	$ 16,422	$ 10,477
Adjustments to Reconcile Net Income to Cash Provided by Operating Activities:
Depreciation and Amortization	3,592	3,657
Provision for Non-Cash Losses on Inventory and Receivables	450	993
Stock Compensation Expense	807	681
Deferred Tax Expense	689	1,288
Other	(359)	(44)
Cash Flows from Changes in Operating Assets and Liabilities:
Accounts Receivable	(6,215)	1,906
Inventories	(2,790)	(4,041)
Accounts Payable	(596)	2,961
Other Current Assets and Liabilities	2,141	250
Billings in Excess of Recoverable Costs and Accrued Profits on Uncompleted Contracts	(1,172)	(688)
Customer Advanced Payments and Deferred Revenue	934	(2,920)
Income Taxes	(832)	417
Supplemental Retirement and Other Liabilities	(150)	(331)
Cash Provided By Operating Activities	12,921	14,606
Cash Flows from Investing Activities:
Capital Expenditures	(12,875)	(2,574)
Other		(207)
Cash Used For Investing Activities	(12,875)	(2,781)
Cash Flows from Financing Activities:
Net Payments For Long-term Debt	(3,897)	(5,831)
Debt Acquisition Costs	(112)
Proceeds from Exercise of Stock Options	1,694	1,084
Income Tax Benefit from Exercise of Stock Options	196
Other	(16)	22
Cash Used For Financing Activities	(2,135)	(4,725)
Effect of Exchange Rates on Cash	(8)	2
(Decrease) Increase in Cash and Cash Equivalents	(2,097)	7,102
Cash and Cash Equivalents at Beginning of Period	22,709	14,949
Cash and Cash Equivalents at End of Period	$ 20,612	$ 22,051