Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	$ 1,183,222	$ 492,350
Gross Unrealized Gains	57	5
Gross Unrealized Losses	(52,379)	(18,101)
Fair Value	1,130,900	474,254
Cash and Cash Equivalents	353,684	356,332
Marketable Securities	39,240	72,180
Short-Term Investments		14,510
Long-Term Investments	156,207	31,232
Cash and cash equivalents	353,684	356,332	$ 155,440
Short-term investments	581,769	14,510
Long-term investments	156,207	31,232
Marketable securities, unrealized gain (loss)	(32,900)
Carrying amount of held-to-maturity securities sold		165,400
Debt securities, available-for-sale, unrealized Loss	349,600
Common stock | Share Purchase Agreement with CLBT
Restricted Cash and Cash Equivalents Items [Line Items]
Marketable Securities		$ 90,000
Investment owned, shares held		9,000,000
Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	378,805	$ 103,544
Gross Unrealized Gains	24	4
Gross Unrealized Losses	(51,026)	(17,820)
Fair Value	327,803	85,728
Cash and Cash Equivalents	115,769	2,844
Marketable Securities	39,240	72,180
Short-Term Investments		10,704
Long-Term Investments	94,367
Short-term investments	78,427
Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	660,673	35,318
Gross Unrealized Gains	33	1
Gross Unrealized Losses	(1,353)	(281)
Fair Value	659,353	35,038
Cash and Cash Equivalents	94,171
Short-Term Investments		3,806
Long-Term Investments	61,840	31,232
Short-term investments	503,342
Cash
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	143,744	353,488
Fair Value	143,744	353,488
Cash and Cash Equivalents	143,744	353,488
Money market funds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	2,669	2,844
Fair Value	2,669	2,844
Cash and Cash Equivalents	2,669	2,844
Agency bonds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	164,486	10,700
Gross Unrealized Gains	6	4
Gross Unrealized Losses	(263)
Fair Value	164,229	10,704
Short-Term Investments		10,704
Long-Term Investments	94,367
Short-term investments	69,862
Treasury bills | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	121,650
Gross Unrealized Gains	18
Gross Unrealized Losses	(3)
Fair Value	121,665
Cash and Cash Equivalents	113,100
Short-term investments	8,565
Marketable securities | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	90,000	90,000
Gross Unrealized Losses	(50,760)	(17,820)
Fair Value	39,240	72,180
Marketable Securities	39,240	72,180
State and municipal obligations | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	4,980	2,570
Gross Unrealized Losses	(33)	(5)
Fair Value	4,947	2,565
Short-Term Investments		1,400
Long-Term Investments		1,165
Short-term investments	4,947
Certificates of deposit | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	5,002
Fair Value	5,002
Short-term investments	5,002
Term Deposit | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	200,000
Fair Value	200,000
Cash and Cash Equivalents	25,000
Short-term investments	175,000
Corporate bonds | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	257,422	32,748
Gross Unrealized Gains	33	1
Gross Unrealized Losses	(1,159)	(276)
Fair Value	256,296	32,473
Cash and Cash Equivalents	28,883
Short-Term Investments		2,406
Long-Term Investments	59,339	$ 30,067
Short-term investments	168,074
Commercial paper | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	160,241
Fair Value	160,241
Cash and Cash Equivalents	40,288
Short-term investments	119,953
US Government Debt Securities | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	30,525
Gross Unrealized Losses	(159)
Fair Value	30,366
Short-term investments	30,366
Treasury inflation - protected securities | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	2,503
Gross Unrealized Losses	(2)
Fair Value	2,501
Long-Term Investments	$ 2,501