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Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Unamortizable intangible assets	$ 159,635	$ 163,553
Gross Carrying Amount, Amortizable intangible assets	2,462,066	2,236,297
Gross Carrying Amount, Total intangible assets	2,621,701	2,399,850
Accumulated Amortization, Amortizable intangible assets	(1,180,393)	(1,000,738)
Management contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Unamortizable intangible assets	86,585	90,503
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Unamortizable intangible assets	56,800	56,800
Trade name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Unamortizable intangible assets	16,250	16,250
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Amortizable intangible assets	843,387	802,597
Accumulated Amortization, Amortizable intangible assets	(435,225)	(355,642)
Mortgage servicing rights [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Amortizable intangible assets	697,322	608,757
Accumulated Amortization, Amortizable intangible assets	(272,852)	(235,626)
Trademarks and Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Amortizable intangible assets	312,699	321,406
Accumulated Amortization, Amortizable intangible assets	(76,514)	(64,866)
Management contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Amortizable intangible assets	200,251	203,291
Accumulated Amortization, Amortizable intangible assets	(135,835)	(122,450)
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	(73,750)	(57,358)
Other amortizable intangible assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Amortizable intangible assets	334,657	226,496
Accumulated Amortization, Amortizable intangible assets	$ (186,217)	$ (164,796)

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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