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Revenues from Contracts with Customers - Summary of Impact to Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |
Leasing and other commissions | $ 159,371 |
Capital Markets | 101,364 |
Gains from mortgage banking activities/originations, net | 38,914 | $ 45,262
Management services, servicing fees and other | 130,811 | 82,362
Compensation and employee benefits | 252,695 | 215,145
Operating, administrative and other | 75,427 | $ 47,382
ASC 606 [Member] | Under Previous U.S. GAAP [Member] |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |
Leasing and other commissions | 148,754 |
Capital Markets | 101,364 |
Gains from mortgage banking activities/originations, net | 38,914 |
Management services, servicing fees and other | 112,424 |
Compensation and employee benefits | 247,053 |
Operating, administrative and other | 57,040 |
ASC 606 [Member] | Effect of Change Higher/(Lower) [Member] |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |
Leasing and other commissions | 10,617 |
Management services, servicing fees and other | 18,387 |
Compensation and employee benefits | 5,642 |
Operating, administrative and other | $ 18,387 |

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- Definition Leasing and other commissions. + References No definition available. + Details
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- Definition Payroll costs incurred (including equity-based compensation) that are directly related to services rendered by an entity during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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