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Marketable Securities - Schedule of Marketable Securities Classified as Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Amortized Cost, Total	$ 1,455,835	$ 1,495,585
Gross Unrealized Gains	172	191
Gross Unrealized Losses	(101,283)	(114,128)
Fair Value	1,354,724	1,381,648
U.S. Treasury securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	2,930	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	2,930	0
Agency securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	16,950	7,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(872)	(786)
Fair Value	16,078	6,214
Mortgage-backed securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	40,072	45,373
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5,642)	(4,525)
Fair Value	34,430	40,848
Corporate Debt Securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	1,089,503	1,106,688
Gross Unrealized Gains	172	188
Gross Unrealized Losses	(69,461)	(77,802)
Fair Value	1,020,214	1,029,074
Municipal securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	301,221	326,058
Gross Unrealized Gains	0	3
Gross Unrealized Losses	(24,728)	(28,861)
Fair Value	276,493	297,200
Other [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	5,159	10,466
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(580)	(2,154)
Fair Value	$ 4,579	$ 8,312

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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