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Revenues from Contracts with Customers - Schedule of Revenues from Contracts with Customers and Our Other Sources of Revenues (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
Revenues From Contracts With Customers [Line Items] |
Revenues from contracts with customers | $ 357,668
Other sources of revenue | 430,460
Leasing and Other Commissions [Member] |
Revenues From Contracts With Customers [Line Items] |
Revenues from contracts with customers | 159,371
Capital Markets [Member] |
Revenues From Contracts With Customers [Line Items] |
Revenues from contracts with customers | 101,364
Management Services [Member] |
Revenues From Contracts With Customers [Line Items] |
Revenues from contracts with customers | 96,933
Gains From Mortgage Banking Activities Originations Net [Member] |
Revenues From Contracts With Customers [Line Items] |
Other sources of revenue | 38,914
Servicing Fees And Other [Member] |
Revenues From Contracts With Customers [Line Items] |
Other sources of revenue | $ 33,878

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