FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Assets and Liabilities at Fair Value, Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 900,038	$ 1,735,765
Short-term investments	2,078,377	2,177,231
Long-term investments	441,727	529,974
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	900,038	1,735,765
Gross Unrealized Gains	1,192	535
Gross Unrealized Losses	(8,729)	(12,107)
Short-term investments	2,078,377	2,177,231
Long-term investments	441,727	529,974
Total assets measured at fair value, amortized cost	3,427,679	4,454,542
Total assets measured at fair value, fair value	3,420,142	4,442,970
Fair Value, Recurring | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	356,602	321,667
Cash, estimated fair value	356,602	321,667
Short-term investments	0	0
Long-term investments	0	0
Fair Value, Recurring | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	494,618	1,377,540
Amortized cost	2,201,906	3,238,989
Gross Unrealized Gains	546	151
Gross Unrealized Losses	(6,193)	(9,431)
Estimated Fair Value	2,196,259	3,229,709
Short-term investments	1,443,875	1,570,591
Long-term investments	257,766	281,578
Fair Value, Recurring | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	48,818	36,558
Amortized cost	869,171	893,886
Gross Unrealized Gains	646	384
Gross Unrealized Losses	(2,536)	(2,676)
Estimated Fair Value	867,281	891,594
Short-term investments	634,502	606,640
Long-term investments	183,961	248,396
Fair Value, Recurring | Money market funds | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	434,842	1,377,540
Amortized cost	434,842	1,377,540
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	434,842	1,377,540
Short-term investments	0	0
Long-term investments	0	0
Fair Value, Recurring | U.S. Treasury securities | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	59,776	0
Amortized cost	1,767,064	1,861,449
Gross Unrealized Gains	546	151
Gross Unrealized Losses	(6,193)	(9,431)
Estimated Fair Value	1,761,417	1,852,169
Short-term investments	1,443,875	1,570,591
Long-term investments	257,766	281,578
Fair Value, Recurring | U.S. government agency securities | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	0
Amortized cost	53,852	43,477
Gross Unrealized Gains	24	46
Gross Unrealized Losses	(74)	(18)
Estimated Fair Value	53,802	43,505
Short-term investments	53,802	43,505
Long-term investments	0	0
Fair Value, Recurring | Certificates of deposit | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	0
Amortized cost	110,152	174,037
Gross Unrealized Gains	54	67
Gross Unrealized Losses	(55)	(132)
Estimated Fair Value	110,151	173,972
Short-term investments	110,151	173,972
Long-term investments	0	0
Fair Value, Recurring | Commercial paper | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	11,987	19,761
Amortized cost	286,565	238,224
Gross Unrealized Gains	23	63
Gross Unrealized Losses	(91)	(122)
Estimated Fair Value	286,497	238,165
Short-term investments	274,510	218,404
Long-term investments	0	0
Fair Value, Recurring | Corporate debt securities | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	36,831	16,797
Amortized cost	418,602	438,148
Gross Unrealized Gains	545	208
Gross Unrealized Losses	(2,316)	(2,404)
Estimated Fair Value	416,831	435,952
Short-term investments	196,039	170,759
Long-term investments	$ 183,961	$ 248,396