Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 138,859	$ 202,655
Current investments, amortized cost of $141,876 and $132,799 in 2024 and 2023, respectively, allowance for credit losses of $0 in 2024 and 2023	139,334	129,392
Accounts receivable, allowance for credit losses of $1,339 and $583 in 2024 and 2023, respectively	138,556	114,164
Unbilled revenue	2,737	2,402
Inventories	170,871	162,285
Prepaid expenses and other current assets	71,173	68,099
Total current assets	661,530	678,997
Non-current investments, amortized cost of $285,376 and $250,790 in 2024 and 2023, respectively, allowance for credit losses of $0 in 2024 and 2023	278,426	244,230
Property, plant, and equipment, net	104,111	105,849
Operating lease assets	74,113	75,115
Goodwill	386,157	393,181
Intangible assets, net	105,054	112,952
Deferred income taxes	397,563	400,400
Other assets	6,279	7,088
Total assets	2,013,233	2,017,812
Current liabilities:
Accounts payable	27,459	21,454
Accrued expenses	70,429	72,374
Accrued income taxes	40,433	16,907
Deferred revenue and customer deposits	39,983	31,525
Operating lease liabilities	9,798	9,624
Total current liabilities	188,102	151,884
Non-current operating lease liabilities	67,367	68,977
Deferred income taxes	239,538	246,877
Reserve for income taxes	28,144	26,685
Non-current accrued income taxes	0	18,338
Other liabilities	893	299
Total liabilities	524,044	513,060
Commitments and Contingencies
Shareholders’ equity:
Preferred stock, $.01 par value – Authorized: 400 shares in 2024 and 2023, respectively; no shares issued and outstanding	0	0
Common stock, $.002 par value – Authorized: 300,000 shares in 2024 and 2023, respectively; issued and outstanding: 171,662 and 171,599 shares in 2024 and 2023, respectively	343	343
Additional paid-in capital	1,047,643	1,037,202
Retained earnings	502,338	512,543
Accumulated other comprehensive loss, net of tax	(61,135)	(45,336)
Total shareholders’ equity	1,489,189	1,504,752
Total liabilities and shareholders' equity	$ 2,013,233	$ 2,017,812