Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 03, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 79,914	$ 51,975
Short-term investments	319,789	296,468
Accounts receivable, less reserves of $746 and $736 in 2016 and 2015, respectively	45,095	42,846
Inventories	35,620	37,334
Prepaid expenses and other current assets	12,512	15,871
Total current assets	492,930	444,494
Long-term investments	249,760	273,088
Property, plant, and equipment, net	53,413	53,285
Goodwill	81,448	81,448
Intangible assets, net	5,270	6,315
Deferred income taxes	28,201	26,517
Other assets	2,615	2,609
Total assets	913,637	887,756
Current liabilities:
Accounts payable	10,296	7,860
Accrued expenses	30,653	33,272
Accrued income taxes	1,494	985
Deferred revenue and customer deposits	11,862	11,571
Total current liabilities	54,305	53,688
Deferred income taxes	334	319
Reserve for income taxes	5,233	4,830
Other non-current liabilities	3,046	3,252
Total liabilities	62,918	62,089
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 140,000 shares, issued and outstanding: 85,052 and 84,856 shares in 2016 and 2015, respectively	170	170
Additional paid-in capital	321,252	311,008
Retained earnings	575,548	566,613
Accumulated other comprehensive loss, net of tax	(46,251)	(52,124)
Total shareholders’ equity	850,719	825,667
Total liabilities and shareholders' equity	$ 913,637	$ 887,756