Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 01, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 395,501	$ 181,374
Current investments, amortized cost of $120,831 and $223,545 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	117,147	218,759
Accounts receivable, allowance for credit losses of $580 and $730 in 2023 and 2022, respectively	130,542	125,417
Unbilled revenue	1,588	2,179
Inventories	133,866	122,480
Prepaid expenses and other current assets	68,347	67,490
Total current assets	846,991	717,699
Non-current investments, amortized cost of $349,060 and $476,148 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	332,991	454,117
Property, plant, and equipment, net	82,965	79,714
Operating lease assets	66,760	37,682
Goodwill	241,042	242,630
Intangible assets, net	9,986	12,414
Deferred income taxes	403,013	407,241
Other assets	6,151	6,643
Total assets	1,989,899	1,958,140
Current liabilities:
Accounts payable	23,053	27,103
Accrued expenses	79,121	93,235
Accrued income taxes	19,302	18,129
Deferred revenue and customer deposits	40,246	40,787
Operating lease liabilities	7,982	8,454
Total current liabilities	169,704	187,708
Non-current operating lease liabilities	60,450	31,298
Deferred income taxes	233,360	249,961
Reserve for income taxes	19,450	15,866
Non-current accrued income taxes	18,337	33,008
Other liabilities	0	1,905
Total liabilities	501,301	519,746
Commitments and Contingencies
Shareholders’ equity:
Preferred stock, $.01 par value – Authorized: 400 shares in 2023 and 2022, respectively; no shares issued and outstanding	0	0
Common stock, $.002 par value – Authorized: 300,000 shares in 2023 and 2022, respectively; issued and outstanding: 172,142 and 172,631 shares in 2023 and 2022, respectively	344	345
Additional paid-in capital	1,023,960	979,167
Retained earnings	534,337	528,179
Accumulated other comprehensive loss, net of tax	(70,043)	(69,297)
Total shareholders’ equity	1,488,598	1,438,394
Total liabilities and shareholders' equity	$ 1,989,899	$ 1,958,140