Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 02, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 164,171	$ 181,374
Current investments, amortized cost of $220,943 and $223,545 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	216,703	218,759
Accounts receivable, allowance for credit losses of $1,001 and $730 in 2023 and 2022, respectively	144,154	125,417
Unbilled revenue	2,354	2,179
Inventories	127,147	122,480
Prepaid expenses and other current assets	67,634	67,490
Total current assets	722,163	717,699
Non-current investments, amortized cost of $478,329 and $476,148 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	463,039	454,117
Property, plant, and equipment, net	81,274	79,714
Operating lease assets	37,769	37,682
Goodwill	242,041	242,630
Intangible assets, net	11,472	12,414
Deferred income taxes	409,583	407,241
Other assets	6,725	6,643
Total assets	1,974,066	1,958,140
Current liabilities:
Accounts payable	26,939	27,103
Accrued expenses	83,527	93,235
Accrued income taxes	37,529	18,129
Deferred revenue and customer deposits	57,805	40,787
Operating lease liabilities	8,177	8,454
Total current liabilities	213,977	187,708
Non-current operating lease liabilities	31,389	31,298
Deferred income taxes	243,557	249,961
Reserve for income taxes	20,030	15,866
Non-current accrued income taxes	18,338	33,008
Other liabilities	444	1,905
Total liabilities	527,735	519,746
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: 172,601 and 172,631 shares in 2023 and 2022, respectively	345	345
Additional paid-in capital	992,690	979,167
Retained earnings	517,526	528,179
Accumulated other comprehensive loss, net of tax	(64,230)	(69,297)
Total shareholders’ equity	1,446,331	1,438,394
Total liabilities and shareholders' equity	$ 1,974,066	$ 1,958,140