CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 27, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 90,576	$ 109,289
Short-term investments	64,993	64,995
Accounts receivable, net	70,002	83,959
Inventories, net	68,901	59,334
Deferred income taxes, net	5,510	5,936
Prepaid expenses and other current assets	18,818	17,021
Total current assets	318,800	340,534
Property and equipment:
Machinery and equipment	45,997	45,254
Furniture and fixtures	5,946	6,156
Leasehold improvements	19,537	19,676
Property and equipment at cost	71,480	71,086
Less: accumulated depreciation and amortization	(40,241)	(41,741)
Property and equipment, net	31,239	29,345
Goodwill	26,885	19,205
Intangible assets, net	16,399	9,109
Service inventory	22,014	20,646
Deferred income taxes, net	6,489	6,624
Total assets	421,826	425,463
Current liabilities:
Accounts payable	9,302	15,437
Accrued liabilities	19,226	26,127
Income taxes payable	403
Current portion of unearned service revenues	23,882	23,572
Customer deposits	1,431	2,046
Total current liabilities	54,244	67,182
Unearned service revenues - less current portion	13,570	13,799
Deferred income tax liability	2,043
Other long-term liabilities	2,961	628
Total liabilities	$ 72,818	$ 81,609
Commitments and contingencies - See Note 16
Shareholders' equity:
Common stock - par value $.001, 50,000,000 shares authorized; 18,073,588 and 17,997,665 issued; 17,393,353 and 17,317,430 outstanding, respectively	$ 18	$ 18
Additional paid-in capital	205,019	200,090
Retained earnings	164,328	159,516
Accumulated other comprehensive loss	(11,282)	(6,695)
Common stock in treasury, at cost - 680,235 shares	(9,075)	(9,075)
Total shareholders' equity	349,008	343,854
Total liabilities and shareholders' equity	$ 421,826	$ 425,463