Consolidated Balance Sheets - USD ($)	Jul. 02, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 68,266,000	$ 79,641,000
Short-term investments	342,402,000	341,194,000
Accounts receivable, less reserves of $1,061 and $873 in 2017 and 2016, respectively	78,593,000	55,438,000
Unbilled revenue	5,939,000	2,217,000
Inventories	36,491,000	26,984,000
Prepaid expenses and other current assets	50,157,000	20,870,000
Total current assets	581,848,000	526,344,000
Long-term investments	354,658,000	324,335,000
Property, plant, and equipment, net	61,196,000	53,992,000
Goodwill	115,089,000	95,280,000
Intangible assets, net	15,226,000	8,312,000
Deferred income taxes	29,681,000	28,022,000
Other assets	3,300,000	2,319,000
Total assets	1,160,998,000	1,038,604,000
Current liabilities:
Accounts payable	22,815,000	9,830,000
Accrued expenses	42,621,000	42,539,000
Accrued income taxes	4,957,000	5,193,000
Deferred revenue and customer deposits	18,011,000	8,211,000
Total current liabilities	88,404,000	65,773,000
Deferred income taxes	5,215,000	0
Reserve for income taxes	6,122,000	5,361,000
Other non-current liabilities	9,281,000	4,871,000
Total liabilities	109,022,000	76,005,000
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 200,000 shares in 2017 and 2016, respectively, issued and outstanding: 86,572 and 85,939 shares in 2017 and 2016, respectively	173,000	172,000
Additional paid-in capital	425,406,000	375,030,000
Retained earnings	669,347,000	643,825,000
Accumulated other comprehensive loss, net of tax	(42,950,000)	(56,428,000)
Total shareholders’ equity	1,051,976,000	962,599,000
Total liabilities and shareholders' equity	$ 1,160,998,000	$ 1,038,604,000