MARKETABLE INVESTMENT SECURITIES, RESTRICTED CASH AND CASH EQUIVALENTS, AND OTHER INVESTMENTS (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Available-for-sale debt securities:
Total marketable investment securities		$ 417,743,000
Restricted cash and cash equivalents	$ 1,615,000	1,118,000
Other investments, net:
Equity method investments	12,238,000	42,859,000
Cost method investments	11,278	11,278,000
Total other investments	23,516,000	54,137,000
Total marketable investment securities, restricted cash and cash equivalents, and other investments	$ 25,131,000	472,998,000
Corporate bonds
Available-for-sale debt securities:
Total marketable investment securities		91,548,000
Commercial paper
Available-for-sale debt securities:
Total marketable investment securities		282,898,000
Other debt securities
Available-for-sale debt securities:
Total marketable investment securities		$ 43,297,000