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Acquisition of Global Workplace Solutions - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 3,061,024 |  | $ 3,085,997
Global Workplace Solutions (GWS) [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Date of business purchase agreement |  | Sep. 01, 2015 |  |
Purchase price paid in cash |  | $ 1,475,000 |  |
Goodwill |  | 852,000 |  |
Goodwill recorded in connection with acquisition deductible for tax purpose |  | $ 445,000 |  |
Amortization expense of acquired intangible assets | $ 16,900 |  | $ 33,800 |
Additional interest expense for debt incurred to finance acquisitions | $ 9,000 |  | 19,300 |
Removal of direct costs |  |  | 4,800 |
Removal of tax impact |  |  | $ 8,000 |

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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