CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023		Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 91,985		$ 93,430
Short-term investments	422,137		484,345
Accounts receivable	139,850		92,664
Inventory	175,795		183,220
Other current assets	87,365		45,791
Total current assets	917,132		899,450
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $143,908 and $117,118	175,150		143,445
ACQUIRED TECHNOLOGY, net of accumulated amortization of $186,850 and $189,671	90,325	[1]	38,382
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $10,414 and $8,989	6,874		8,247
GOODWILL	15,535		15,535
INVESTMENTS	299,548		259,861
DEFERRED INCOME TAXES	59,108		58,161
OTHER ASSETS	105,289		109,739
TOTAL ASSETS	1,668,961		1,532,820
CURRENT LIABILITIES:
Accounts payable	10,933		9,519
Accrued expenses	52,080		51,002
Deferred revenue	47,713		45,599
Other current liabilities	8,096		29,577
Total current liabilities	118,822		135,697
DEFERRED REVENUE	12,006		18,279
RETIREMENT PLAN BENEFIT LIABILITY	52,249		59,790
OTHER LIABILITIES	38,658		43,685
Total liabilities	221,735		257,451
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, 48,731,026and 49,136,030 shares issued, and 47,365,378 and 47,770,382 share outstanding at December 31, 2023 and December 31, 2022, respectively	487		491
Additional paid-in capital	699,554		681,335
Retained earnings	789,553		653,277
Accumulated other comprehensive loss	(1,086)		(18,452)
Treasury stock, at cost (1,365,648 shares at December 31, 2023 and December 31, 2022)	(41,284)		(41,284)
Total shareholders’ equity	1,447,226		1,275,369
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,668,961		$ 1,532,820

[1] During the year ended December 31, 2023, the gross value and accumulated amortization associated with the PD-LD, Inc. and Motorola patent portfolios have been removed from the table as the underlying patents have reached the end of their useful lives.