XML 66 R56.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Derivative Instruments and Hedging Activities - Summary of Interest Rate Swaps Derivatives Designated as Cash Flow Hedges (Parenthetical) (Details) - Designated as Hedging Instrument - Interest Rate Swap | Sep. 15, 2022 | Aug. 25, 2022
--- | --- | ---
London Interbank Offered Rate (LIBOR) | August 31, 2017 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate | 1.8475% |
London Interbank Offered Rate (LIBOR) | August 8, 2018 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate |  | 2.854%
London Interbank Offered Rate (LIBOR) | February 20, 2020 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate |  | 1.294%
SOFR | August 31, 2017 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate | 1.795% |
SOFR | August 8, 2018 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate |  | 2.736%
SOFR | February 20, 2020 |  |
Derivative [Line Items] |  |
Derivative Fixed Interest Rate |  | 1.191%

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=icfi_August312017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=icfi_August82018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=icfi_February202020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |