CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 202,655	$ 181,374
Current investments, amortized cost of $132,799 and $223,545 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	129,392	218,759
Accounts receivable, allowance for credit losses of $583 and $730 in 2023 and 2022, respectively	114,164	125,417
Unbilled revenue	2,402	2,179
Inventories	162,285	122,480
Prepaid expenses and other current assets	68,099	67,490
Total current assets	678,997	717,699
Non-current investments, amortized cost of $250,790 and $476,148 in 2023 and 2022, respectively, allowance for credit losses of $0 in 2023 and 2022	244,230	454,117
Property, plant, and equipment, net	105,849	79,714
Operating lease assets	75,115	37,682
Goodwill	393,181	242,630
Intangible assets, net	112,952	12,414
Deferred income taxes	400,400	407,241
Other assets	7,088	6,643
Total assets	2,017,812	1,958,140
Current liabilities:
Accounts payable	21,454	27,103
Accrued expenses	72,374	93,235
Accrued income taxes	16,907	18,129
Deferred revenue and customer deposits	31,525	40,787
Operating lease liabilities	9,624	8,454
Total current liabilities	151,884	187,708
Non-current operating lease liabilities	68,977	31,298
Deferred income taxes	246,877	249,961
Reserve for income taxes	26,685	15,866
Non-current accrued income taxes	18,338	33,008
Other liabilities	299	1,905
Total liabilities	513,060	519,746
Commitments and contingencies (Note 11)
Authorized shares (in shares)	400,000	400,000
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Shareholders’ equity:
Preferred stock, $0.01 par value - Authorized: 400 shares in 2023 and 2022, respectively, no shares issued and outstanding	$ 0	$ 0
Common stock, $0.002 par value – Authorized: 300,000 shares in 2023 and 2022, respectively, issued and outstanding: 171,599 and 172,631 shares in 2023 and 2022, respectively	343	345
Additional paid-in capital	1,037,202	979,167
Retained earnings	512,543	528,179
Accumulated other comprehensive loss, net of tax	(45,336)	(69,297)
Total shareholders’ equity	1,504,752	1,438,394
Total liabilities and shareholders' equity	$ 2,017,812	$ 1,958,140