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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2024

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value On a Recurring Basis

Financial instruments measured at fair value on a recurring basis:

						As of December 31, 2024																		As of December 31, 2023
(in thousands)						Total						Level 1						Level 2						Total						Level 1						Level 2
Cash equivalents
US Government and agency obligations						$	81,535					$	—					$	81,535					$	10,201					$	—					$	10,201
Money market funds						41,494						41,494						—						33,613						33,613						—
Commercial paper						22,689						—						22,689						19,575						—						19,575
Municipal debt securities						10,299						—						10,299						7,848						—						7,848
Corporate debt securities						4,133						—						4,133						—						—						—
Total cash equivalents						160,150						41,494						118,656						71,237						33,613						37,624
Short-term
Corporate debt securities						242,313						—						242,313						210,982						—						210,982
Commercial paper						149,807						—						149,807						237,870						—						237,870
US Government and agency obligations						94,295						—						94,295						208,648						—						208,648
Certificates of deposit						7,239						—						7,239						—						—						—
Municipal debt securities						1,580						—						1,580						13,914						—						13,914
Total short-term						495,234						—						495,234						671,414						—						671,414
Long-term
Corporate debt securities						39,931						—						39,931						43,869						—						43,869
US Government and agency obligations						10,452						—						10,452						12,135						—						12,135
Municipal debt securities						1,342						—						1,342						—						—						—
Total long-term						51,725						—						51,725						56,004						—						56,004
Total financial instruments						$	707,109					$	41,494					$	665,615					$	798,655					$	33,613					$	765,042

Debt Instrument, Fair Value Disclosure

Carrying value and estimated fair value of long-term debt, including current maturities and without reduction for related costs:

						As of December 31, 2024												As of December 31, 2023
(in thousands)						Carrying Value						Estimated Fair Value						Carrying Value						Estimated Fair Value						Fair Value Level
Non-publicly held debt						$	1,653,737					$	1,667,275					$	1,826,921					$	1,815,351					3

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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X

- References

No definition available.

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X

- Definition

Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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