CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 102,808	$ 53,262
Short-term investments	7,421	51,740
Accounts receivable, net	36,986	41,922
Inventories:
Raw materials and purchased parts	37,140	47,186
Work in process	14,958	15,504
Finished goods	10,234	19,999
Total inventories	62,332	82,689
Deferred income taxes	4,746	6,646
Other current assets	6,790	7,557
Total current assets	221,083	243,816
Property, plant and equipment, at cost:
Land and land improvements	12,106	12,002
Buildings and building improvements	31,209	31,190
Machinery and equipment	40,108	38,007
Property plant and equipment, gross	83,423	81,199
Less accumulated depreciation and amortization	(47,959)	(44,218)
Net property, plant and equipment	35,464	36,981
Goodwill	58,756	58,060
Intangible assets, net	18,977	21,828
Other assets	593	923
Total consolidated assets	334,873	361,608
Current liabilities:
Accounts payable	13,217	18,625
Accrued compensation and benefits	10,271	12,652
Accrued warranty	4,692	6,801
Deferred profit	2,139	2,821
Income taxes payable	1,109	2,518
Other accrued liabilities	4,952	8,454
Total current liabilities	36,380	51,871
Other accrued liabilities	5,847	5,964
Deferred income taxes	11,747	12,742
Commitments and contingencies
Stockholders' equity:
Preferred stock, $1 par value; 1,000 shares authorized, none issued
Common stock, $1 par value; 60,000 shares authorized, 24,632 shares issued and outstanding in 2012 and 24,330 shares in 2011	24,632	24,330
Paid-in capital	83,547	77,658
Retained earnings	170,937	189,055
Accumulated other comprehensive income (loss)	1,783	(12)
Total stockholders' equity	280,899	291,031
Total liabilities and stockholders' equity	$ 334,873	$ 361,608