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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Goodwill by Segment | The following table summarizes the changes in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 (dollars in thousands):
|  |  |  |  |  |  |  |  |  |  |  |  |  | Global |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Asia |  |  | Investment |  |  | Development |  |  |  |  |
|  | Americas |  |  | EMEA |  |  | Pacific |  |  | Management |  |  | Services |  |  | Total |
Balance as of December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 2,260,076 |  |  | $ | 1,172,150 |  |  | $ | 155,875 |  |  | $ | 479,739 |  |  | $ | 86,663 |  |  | $ | 4,154,503 |
Accumulated impairment losses |  |  | (798,290 | ) |  |  | (138,631 | ) |  |  | — |  |  |  | (44,922 | ) |  |  | (86,663 | ) |  |  | (1,068,506 | )
|  |  | 1,461,786 |  |  |  | 1,033,519 |  |  |  | 155,875 |  |  |  | 434,817 |  |  |  | — |  |  |  | 3,085,997 |
Purchase accounting entries related to acquisitions |  |  | 42,080 |  |  |  | 36,929 |  |  |  | (3,922 | ) |  |  | 350 |  |  |  | — |  |  |  | 75,437 |
Foreign exchange movement |  |  | 773 |  |  |  | (161,784 | ) |  |  | (1,247 | ) |  |  | (17,784 | ) |  |  | — |  |  |  | (180,042 | )
Balance as of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 2,302,929 |  |  |  | 1,047,295 |  |  |  | 150,706 |  |  |  | 462,305 |  |  |  | 86,663 |  |  |  | 4,049,898 |
Accumulated impairment losses |  |  | (798,290 | ) |  |  | (138,631 | ) |  |  | — |  |  |  | (44,922 | ) |  |  | (86,663 | ) |  |  | (1,068,506 | )
|  |  | 1,504,639 |  |  |  | 908,664 |  |  |  | 150,706 |  |  |  | 417,383 |  |  |  | — |  |  |  | 2,981,392 |
Purchase accounting entries related to acquisitions |  |  | 104,654 |  |  |  | 17,402 |  |  |  | 4,198 |  |  |  | 17,568 |  |  |  | — |  |  |  | 143,822 |
Foreign exchange movement |  |  | 993 |  |  |  | 91,761 |  |  |  | 11,204 |  |  |  | 25,568 |  |  |  | — |  |  |  | 129,526 |
Balance as of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 2,408,576 |  |  |  | 1,156,458 |  |  |  | 166,108 |  |  |  | 505,441 |  |  |  | 86,663 |  |  |  | 4,323,246 |
Accumulated impairment losses |  |  | (798,290 | ) |  |  | (138,631 | ) |  |  | — |  |  |  | (44,922 | ) |  |  | (86,663 | ) |  |  | (1,068,506 | )
|  | $ | 1,610,286 |  |  | $ | 1,017,827 |  |  | $ | 166,108 |  |  | $ | 460,519 |  |  | $ | — |  |  | $ | 3,254,740 |
Schedule of Intangible Assets | Other intangible assets totaled $1.4 billion, net of accumulated amortization of $1.0 billion as of December 31, 2017, and $1.4 billion, net of accumulated amortization of $771.7 million, as of December 31, 2017 and 2016, respectively, and are comprised of the following (dollars in thousands):
|  | December 31, |
|  | 2017 |  |  | 2016 |
|  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |
|  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Accumulated |
|  | Amount |  |  | Amortization |  |  | Amount |  |  | Amortization |
Unamortizable intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management contracts |  | $ | 90,503 |  |  |  |  |  |  | $ | 101,355 |  |  |  |  |
Trademarks |  |  | 56,800 |  |  |  |  |  |  |  | 56,800 |  |  |  |  |
Trade names |  |  | 16,250 |  |  |  |  |  |  |  | 18,100 |  |  |  |  |
|  | $ | 163,553 |  |  |  |  |  |  | $ | 176,255 |  |  |  |  |
Amortizable intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 802,597 |  |  | $ | (355,642 | ) |  | $ | 761,290 |  |  | $ | (270,447 | )
Mortgage servicing rights |  |  | 608,757 |  |  |  | (235,626 | ) |  |  | 501,087 |  |  |  | (180,563 | )
Trademarks/Trade name |  |  | 321,406 |  |  |  | (64,866 | ) |  |  | 306,559 |  |  |  | (46,837 | )
Management contracts |  |  | 203,291 |  |  |  | (122,450 | ) |  |  | 177,014 |  |  |  | (99,733 | )
Covenant not to compete |  |  | 73,750 |  |  |  | (57,358 | ) |  |  | 73,750 |  |  |  | (32,777 | )
Other |  |  | 226,496 |  |  |  | (164,796 | ) |  |  | 186,757 |  |  |  | (141,316 | )
|  | $ | 2,236,297 |  |  | $ | (1,000,738 | ) |  | $ | 2,006,457 |  |  | $ | (771,673 | )
Total intangible assets |  | $ | 2,399,850 |  |  | $ | (1,000,738 | ) |  | $ | 2,182,712 |  |  | $ | (771,673 | )

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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