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Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Unamortizable intangible assets | $ 176,255 | $ 180,343
Gross Carrying Amount, Amortizable intangible assets | 2,006,457 | 1,859,362
Gross Carrying Amount, Total intangible assets | 2,182,712 | 2,039,705
Accumulated Amortization, Amortizable intangible assets | (771,673) | (589,236)
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 761,290 | 746,814
Accumulated Amortization, Amortizable intangible assets | (270,447) | (195,056)
Mortgage servicing rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 501,087 | 377,995
Accumulated Amortization, Amortizable intangible assets | (180,563) | (133,272)
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 306,559 | 320,306
Accumulated Amortization, Amortizable intangible assets | (46,837) | (38,581)
Management contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Unamortizable intangible assets | 101,355 | 103,143
Gross Carrying Amount, Amortizable intangible assets | 177,014 | 180,099
Accumulated Amortization, Amortizable intangible assets | (99,733) | (87,687)
Non-compete agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 73,750 | 73,750
Accumulated Amortization, Amortizable intangible assets | (32,777) | (8,194)
Backlog and incentive fees [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 48,445 | 49,667
Accumulated Amortization, Amortizable intangible assets | (48,445) | (49,667)
Other amortizable intangible assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable intangible assets | 138,312 | 110,731
Accumulated Amortization, Amortizable intangible assets | (92,871) | (76,779)
Trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Unamortizable intangible assets | 56,800 | 56,800
Trade names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Unamortizable intangible assets | $ 18,100 | $ 20,400

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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