CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 41,393	$ 102,808	[1]
Short-term investments	7,308	7,421	[1]
Accounts receivable, net	56,520	36,986	[1]
Inventories:
Raw materials and purchased parts	42,988	37,140	[1]
Work in process	20,045	14,958	[1]
Finished goods	10,268	10,234	[1]
Total inventories	73,301	62,332	[1]
Deferred income taxes	6,099	4,746	[1]
Other current assets	8,572	6,790	[1]
Total current assets	193,193	221,083	[1]
Property, plant and equipment, at cost:
Land and land improvements	11,971	12,106	[1]
Buildings and building improvements	31,406	31,209	[1]
Machinery and equipment	41,221	40,108	[1]
Property plant and equipment, gross	84,598	83,423	[1]
Less accumulated depreciation and amortization	(48,895)	(47,959)	[1]
Net property, plant and equipment	35,703	35,464	[1]
Goodwill	76,265	58,756	[1]
Intangible assets, net	41,134	18,977	[1]
Other assets	703	593	[1]
Total consolidated assets	346,998	334,873	[1]
Current liabilities:
Accounts payable	18,383	13,217	[1]
Accrued compensation and benefits	14,219	10,271	[1]
Accrued warranty	5,340	4,692	[1]
Deferred profit	5,561	2,139	[1]
Income taxes payable	2,011	1,109	[1]
Other accrued liabilities	9,126	4,952	[1]
Total current liabilities	54,640	36,380	[1]
Other accrued liabilities	13,971	5,847	[1]
Deferred income taxes	14,014	11,747	[1]
Commitments and contingencies			[1]
Stockholders' equity:
Preferred stock, $1 par value; 1,000 shares authorized, none issued			[1]
Common stock, $1 par value; 60,000 shares authorized, 24,713 shares issued and outstanding in 2013 and 24,632 shares in 2012	24,713	24,632	[1]
Paid-in capital	84,468	83,547	[1]
Retained earnings	157,355	170,937	[1]
Accumulated other comprehensive income (loss)	(2,163)	1,783	[1]
Total stockholders' equity	264,373	280,899	[1]
Total liabilities and stockholders' equity	$ 346,998	$ 334,873	[1]

[1] Derived from December 29, 2012 audited financial statements