XML 53 R46.htm IDEA: XBRL DOCUMENT
v3.24.3

Revenue Recognition - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | $ 516,998 | $ 501,519 | $ 1,523,463 | $ 1,484,886
Time-and-Materials |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 220,564 | 206,622 | 644,822 | 615,902
Fixed-Price |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 236,538 | 223,338 | 696,211 | 667,982
Cost-Based |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 59,896 | 71,559 | 182,430 | 201,002
U.S. Federal Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 282,022 | 279,314 | 829,688 | 820,116
U.S. State and Local Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 78,883 | 76,594 | 240,685 | 233,264
International Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 26,871 | 27,547 | 80,831 | 74,378
Total Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | 387,776 | 383,455 | 1,151,204 | 1,127,758
Commercial |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | $ 129,222 | $ 118,064 | $ 372,259 | $ 357,128
Customer Concentration Risk | Revenue from Contract with Customer |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 100.00% | 100.00% | 100.00% | 100.00%
Customer Concentration Risk | Revenue from Contract with Customer | Time-and-Materials |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 43.00% | 41.00% | 42.00% | 41.00%
Customer Concentration Risk | Revenue from Contract with Customer | Fixed-Price |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 46.00% | 45.00% | 46.00% | 45.00%
Customer Concentration Risk | Revenue from Contract with Customer | Cost-Based |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 11.00% | 14.00% | 12.00% | 14.00%
Customer Concentration Risk | Revenue from Contract with Customer | U.S. Federal Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 55.00% | 56.00% | 55.00% | 55.00%
Customer Concentration Risk | Revenue from Contract with Customer | U.S. State and Local Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 15.00% | 15.00% | 16.00% | 16.00%
Customer Concentration Risk | Revenue from Contract with Customer | International Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 5.00% | 5.00% | 5.00% | 5.00%
Customer Concentration Risk | Revenue from Contract with Customer | Total Government |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 75.00% | 76.00% | 76.00% | 76.00%
Customer Concentration Risk | Revenue from Contract with Customer | Commercial |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 25.00% | 24.00% | 24.00% | 24.00%
Energy, Environment, Infrastructure, and Disaster Recovery |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | $ 236,039 | $ 204,740 | $ 693,229 | $ 595,769
Energy, Environment, Infrastructure, and Disaster Recovery | Customer Concentration Risk | Revenue from Contract with Customer |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 46.00% | 41.00% | 46.00% | 40.00%
Health and Social Programs |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | $ 196,586 | $ 209,760 | $ 582,191 | $ 617,997
Health and Social Programs | Customer Concentration Risk | Revenue from Contract with Customer |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 38.00% | 42.00% | 38.00% | 42.00%
Security and Other Civilian & Commercial |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients | $ 84,373 | $ 87,019 | $ 248,043 | $ 271,120
Security and Other Civilian & Commercial | Customer Concentration Risk | Revenue from Contract with Customer |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenue from clients, Percent | 16.00% | 17.00% | 16.00% | 18.00%

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-20 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-20 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_TimeAndMaterialsContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_FixedPriceContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=icfi_CostBasedContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=icfi_USFederalGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=icfi_USStateAndLocalGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=icfi_InternationalGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=icfi_USStateAndInternationalGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=icfi_CommercialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromContractWithCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=icfi_EnergyEnvironmentInfrastructureAndDisasterRecoveryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=icfi_HealthAndSocialProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=icfi_SecurityAndOtherCivilianAndCommercialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |