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Guarantor and Nonguarantor Financial Statements - Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Condensed Statement of Income Captions [Line Items] |  |
Revenue | $ 5,135,510 | $ 4,673,952
Cost of services | 4,022,034 | 3,619,961
Operating, administrative and other | 792,876 | 732,235
Depreciation and amortization | 105,823 | 108,165
Intangible asset impairment | 89,037 |
Total costs and expenses | 5,009,770 | 4,460,361
Gain on disposition of real estate | 19,247 | 18
Operating income | 144,987 | 213,609
Equity income from unconsolidated subsidiaries | 72,664 | 40,179
Other income (loss) | 20,853 | (4,280)
Interest income | 1,534 | 3,621
Interest expense | 22,726 | 28,858
Write-off of financing costs on extinguished debt | 2,608 | 27,982
Income before provision for income taxes | 214,704 | 196,289
(Benefit of) provision for income taxes | 43,878 | 46,164
Net income | 170,826 | 150,125
Less: Net income attributable to non-controlling interests | 6,417 | (163)
Net income attributable to CBRE Group, Inc. | 164,409 | 150,288
Eliminations [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Interest income | (29,259) | (32,686)
Interest expense | (29,259) | (32,686)
Income from consolidated subsidiaries | (364,762) | (388,087)
Income before provision for income taxes | (364,762) | (388,087)
Net income | (364,762) | (388,087)
Net income attributable to CBRE Group, Inc. | (364,762) | (388,087)
Parent [Member] | Reportable Legal Entities [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Operating, administrative and other | 250 | 5,704
Total costs and expenses | 250 | 5,704
Operating income | (250) | (5,704)
Income from consolidated subsidiaries | 164,593 | 154,573
Income before provision for income taxes | 164,343 | 148,869
(Benefit of) provision for income taxes | (66) | (1,419)
Net income | 164,409 | 150,288
Net income attributable to CBRE Group, Inc. | 164,409 | 150,288
CBRE Services [Member] | Reportable Legal Entities [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Operating, administrative and other | 304 | 485
Total costs and expenses | 304 | 485
Operating income | (304) | (485)
Interest income | 29,259 | 32,686
Interest expense | 19,393 | 27,875
Write-off of financing costs on extinguished debt | 2,608 | 27,982
Income from consolidated subsidiaries | 159,475 | 172,343
Income before provision for income taxes | 166,429 | 148,687
(Benefit of) provision for income taxes | 1,836 | (5,886)
Net income | 164,593 | 154,573
Net income attributable to CBRE Group, Inc. | 164,593 | 154,573
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Revenue | 2,966,117 | 2,617,694
Cost of services | 2,343,867 | 2,057,613
Operating, administrative and other | 415,731 | 360,631
Depreciation and amortization | 65,599 | 64,309
Intangible asset impairment | 89,037 |
Total costs and expenses | 2,914,234 | 2,482,553
Gain on disposition of real estate | 19,231 | 18
Operating income | 71,114 | 135,159
Equity income from unconsolidated subsidiaries | 71,786 | 39,292
Other income (loss) | 1,680 | 1,710
Interest income | 154 | 2,452
Interest expense | 17,626 | 27,031
Royalty and management service expense (income) | 6,740 | 13,171
Income from consolidated subsidiaries | 40,694 | 61,171
Income before provision for income taxes | 161,062 | 199,582
(Benefit of) provision for income taxes | 1,587 | 27,239
Net income | 159,475 | 172,343
Net income attributable to CBRE Group, Inc. | 159,475 | 172,343
Nonguarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Revenue | 2,169,393 | 2,056,258
Cost of services | 1,678,167 | 1,562,348
Operating, administrative and other | 376,591 | 365,415
Depreciation and amortization | 40,224 | 43,856
Total costs and expenses | 2,094,982 | 1,971,619
Gain on disposition of real estate | 16 |
Operating income | 74,427 | 84,639
Equity income from unconsolidated subsidiaries | 878 | 887
Other income (loss) | 19,173 | (5,990)
Interest income | 1,380 | 1,169
Interest expense | 14,966 | 6,638
Royalty and management service expense (income) | (6,740) | (13,171)
Income before provision for income taxes | 87,632 | 87,238
(Benefit of) provision for income taxes | 40,521 | 26,230
Net income | 47,111 | 61,008
Less: Net income attributable to non-controlling interests | 6,417 | (163)
Net income attributable to CBRE Group, Inc. | $ 40,694 | $ 61,171

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