CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 96,066	$ 109,289
Short-term investments	64,993	64,995
Accounts receivable, net	62,339	83,959
Inventories, net	66,652	59,334
Deferred income taxes, net	5,860	5,936
Prepaid expenses and other current assets	17,809	17,021
Total current assets	313,719	340,534
Property and equipment:
Machinery and equipment	46,067	45,254
Furniture and fixtures	5,984	6,156
Leasehold improvements	19,658	19,676
Property and equipment at cost	71,709	71,086
Less: accumulated depreciation and amortization	(41,608)	(41,741)
Property and equipment, net	30,101	29,345
Goodwill	25,761	19,205
Intangible assets, net	16,933	9,109
Service inventory	21,494	20,646
Deferred income taxes, net	6,453	6,624
Total assets	414,461	425,463
Current liabilities:
Accounts payable	11,196	15,437
Accrued liabilities	19,771	26,127
Current portion of unearned service revenues	23,040	23,572
Customer deposits	1,556	2,046
Total current liabilities	55,563	67,182
Unearned service revenues - less current portion	13,201	13,799
Deferred income tax liability	2,025
Other long-term liabilities	2,423	628
Total liabilities	73,212	81,609
Commitments and contingencies - See Note 16
Shareholders' equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,057,768 and 17,997,665 issued; 17,377,533 and 17,317,430 outstanding, respectively	18	18
Additional paid-in capital	203,599	200,090
Retained earnings	160,180	159,516
Accumulated other comprehensive loss	(13,473)	(6,695)
Common stock in treasury, at cost - 680,235 shares	(9,075)	(9,075)
Total shareholders' equity	341,249	343,854
Total liabilities and shareholders' equity	$ 414,461	$ 425,463