CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 157,473	$ 98,980
Short-term investments	413,805	393,690
Accounts receivable	139,563	113,648
Inventory	197,398	182,938
Other current assets	110,175	110,575
Total current assets	1,018,414	899,831
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $168,110 and $169,877	196,263	195,239
ACQUIRED TECHNOLOGY, net of accumulated amortization of $207,814 and $203,621	69,361	73,554
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $12,194 and $11,842	5,094	5,446
GOODWILL	15,535	15,535
INVESTMENTS	369,027	457,593
DEFERRED INCOME TAXES	81,410	78,320
OTHER ASSETS	109,383	106,815
TOTAL ASSETS	1,864,487	1,832,333
CURRENT LIABILITIES:
Accounts payable	28,294	36,590
Accrued expenses	35,089	46,026
Deferred revenue	22,772	33,074
Other current liabilities	26,944	9,720
Total current liabilities	113,099	125,410
DEFERRED REVENUE	2,348	537
RETIREMENT PLAN BENEFIT LIABILITY	54,867	54,450
OTHER LIABILITIES	34,841	35,411
Total liabilities	205,155	215,808
COMMITMENTS AND CONTINGENCIES (Note 18)
SHAREHOLDERS' EQUITY:
Preferred Stock, par value $0.01 per share, 5,000,000 shares authorized, 200,000 shares of Series A Nonconvertible Preferred Stock issued and outstanding (liquidation value of $7.50 per share or $1,500)	2	2
Common Stock, par value $0.01 per share, 200,000,000 shares authorized, 48,937,424 and 48,834,541 shares issued, and 47,571,776 and 47,468,893 shares outstanding, at March 31, 2025 and December 31, 2024, respectively	489	488
Additional paid-in capital	722,275	723,719
Retained earnings	977,556	934,655
Accumulated other comprehensive income (loss)	294	(1,055)
Treasury stock, at cost (1,365,648 shares at March 31, 2025 and December 31, 2024)	(41,284)	(41,284)
Total shareholders’ equity	1,659,332	1,616,525
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,864,487	$ 1,832,333