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FacilitySource Acquisition - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 12, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Business Acquisition [Line Items] |  |  |  |  |
Revenue |  | $ 5,111,434 | $ 4,439,571 | $ 9,785,386 | $ 8,490,537
Operating loss |  | 225,316 | 228,328 | 438,925 | 433,539
Net income attributable to CBRE Group, Inc. |  | 228,667 | 201,777 | $ 378,955 | 338,797
Direct transaction and integration costs |  |  | $ 15,408 |  | $ 27,351
FacilitySource [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Date of business purchase agreement |  |  |  | Jun. 12, 2018 |
Estimated purchase price | $ 265,465 |  |  |  |
Purchase price payable in cash | $ 262,000 |  |  |  |
Revenue |  | 12,600 |  | $ 12,600 |
Operating loss |  | (200) |  | (200) |
Net income attributable to CBRE Group, Inc. |  | (200) |  | (200) |
Direct transaction and integration costs |  | 200 |  | 200 |
Depreciation and amortization expense |  | $ 600 |  | 600 |
Removal of direct costs |  |  |  | 200 |
Removal of tax impact |  |  |  | $ 200 |
Blocker Corp [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Blocker Units purchase from Stockholders | 1,686,013 |  |  |  |

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