XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.22.2

Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value Measurements | $ 521,857 | $ 601,011
Mutual funds |  |
Fair Value Measurements | 102,514 | 110,006
U.S. Treasury notes |  |
Fair Value Measurements | 205,816 | 223,896
Corporate debt securities |  |
Fair Value Measurements | 205,254 | 155,796
Money market mutual fund |  |
Fair Value Measurements | 8,273 | 111,313
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurements | 521,857 | 601,011
Fair Value, Inputs, Level 1 [Member] | Mutual funds |  |
Fair Value Measurements | 102,514 | 110,006
Fair Value, Inputs, Level 1 [Member] | U.S. Treasury notes |  |
Fair Value Measurements | 205,816 | 223,896
Fair Value, Inputs, Level 1 [Member] | Corporate debt securities |  |
Fair Value Measurements | 205,254 | 155,796
Fair Value, Inputs, Level 1 [Member] | Money market mutual fund |  |
Fair Value Measurements | $ 8,273 | $ 111,313

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USTreasuryNotesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |