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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022																		As of December 31, 2021
(in thousands)						Total						Level 1						Level 2						Total						Level 1						Level 2
Cash equivalents
Money market funds						$	88,073					$	88,073					$	—					$	25,019					$	25,019					$	—
Commercial paper						50,791						—						50,791						179,455						—						179,455
Municipal debt securities						8,599						—						8,599						63,875						—						63,875
Total cash equivalents						147,463						88,073						59,390						268,349						25,019						243,330
Short-term
Commercial paper						421,279						—						421,279						419,469						—						419,469
Corporate debt securities						166,136						—						166,136						234,436						—						234,436
Federal agency debt securities						107,222						—						107,222						—						—						—
Municipal debt securities						30,426						—						30,426						165,572						—						165,572
Total short-term						725,063						—						725,063						819,477						—						819,477
Long-term
Corporate debt securities						35,688						—						35,688						—						—						—
Federal agency debt securities						20,050						—						20,050						—						—						—
Municipal debt securities						7,580						—						7,580						2,231						—						2,231
Total long-term						63,318						—						63,318						2,231						—						2,231
Total financial instruments						$	935,844					$	88,073					$	847,771					$	1,090,057					$	25,019					$	1,065,038

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, 2022												As of December 31, 2021
(in thousands)						Carrying Value						Estimated Fair Value						Carrying Value						Estimated Fair Value						Fair Value Level
Non-publicly held debt						$	1,626,114					$	1,561,939					$	1,447,462					$	1,261,170					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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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