XML 73 R62.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair Value - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Assets, Total | $ 17,481 | $ 16,899
Liabilities: |  |
Liabilities, Total | 26,402 | 28,203
Forward Contract Agreements | Prepaid Expenses and Other |  |
Assets: |  |
Assets, Total | 74 | 103
Deferred Compensation Investments in Cash Surrender Life Insurance | Other Assets |  |
Assets: |  |
Assets, Total | 17,407 | 16,796
Deferred Compensation Plan Liabilities | Other Long-Term Liabilities |  |
Liabilities: |  |
Liabilities, Total | 18,264 | 17,276
Interest Rate Swap | Other Long-Term Liabilities |  |
Liabilities: |  |
Liabilities, Total | 4,475 | 7,234
Interest Rate Swap | Accrued Expenses and Other Current Liabilities |  |
Liabilities: |  |
Liabilities, Total | 3,663 | 3,693
Level 2 |  |
Assets: |  |
Assets, Total | 17,481 | 16,899
Liabilities: |  |
Liabilities, Total | 26,402 | 28,203
Level 2 | Forward Contract Agreements | Prepaid Expenses and Other |  |
Assets: |  |
Assets, Total | 74 | 103
Level 2 | Deferred Compensation Investments in Cash Surrender Life Insurance | Other Assets |  |
Assets: |  |
Assets, Total | 17,407 | 16,796
Level 2 | Deferred Compensation Plan Liabilities | Other Long-Term Liabilities |  |
Liabilities: |  |
Liabilities, Total | 18,264 | 17,276
Level 2 | Interest Rate Swap | Other Long-Term Liabilities |  |
Liabilities: |  |
Liabilities, Total | 4,475 | 7,234
Level 2 | Interest Rate Swap | Accrued Expenses and Other Current Liabilities |  |
Liabilities: |  |
Liabilities, Total | $ 3,663 | $ 3,693

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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
Name: | us-gaap_FinancialLiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=icfi_DeferredCompensationInvestmentsInCashSurrenderLifeInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=icfi_DeferredCompensationPlanLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=icfi_AccruedExpensesAndOtherCurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |