CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 95,804	$ 98,980
Short-term investments	429,404	393,690
Accounts receivable	147,043	113,648
Inventory	208,199	182,938
Other current assets	130,352	110,575
Total current assets	1,010,802	899,831
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $174,863 and $169,877	205,131	195,239
ACQUIRED TECHNOLOGY, net of accumulated amortization of $212,007 and $203,621	65,168	73,554
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $12,550 and $11,842	4,738	5,446
GOODWILL	15,535	15,535
INVESTMENTS	432,368	457,593
DEFERRED INCOME TAXES	82,909	78,320
OTHER ASSETS	115,047	106,815
TOTAL ASSETS	1,931,698	1,832,333
CURRENT LIABILITIES:
Accounts payable	38,467	36,590
Accrued expenses	44,082	46,026
Deferred revenue	36,005	33,074
Other current liabilities	7,001	9,720
Total current liabilities	125,555	125,410
DEFERRED REVENUE	2,224	537
RETIREMENT PLAN BENEFIT LIABILITY	55,285	54,450
OTHER LIABILITIES	34,022	35,411
Total liabilities	217,086	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, 48,899,719 and 48,834,541 shares issued, and 47,534,071 and 47,468,893 shares outstanding, at June 30, 2025 and December 31, 2024, respectively	489	488
Additional paid-in capital	732,068	723,719
Retained earnings	1,023,184	934,655
Accumulated other comprehensive income (loss)	153	(1,055)
Treasury stock, at cost (1,365,648 shares at June 30, 2025 and December 31, 2024)	(41,284)	(41,284)
Total shareholders’ equity	1,714,612	1,616,525
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,931,698	$ 1,832,333