Servicing of Residential Loans - Schedule of Servicing Rights Carried at Fair Value (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of the year	$ 1,682,016	$ 1,599,541	$ 1,131,124
Sales	(458,541)	(60,094)	(10,866)
Other	(16,651)	0	0
Change in fair value due to:
Changes in valuation inputs or other assumptions	(243,645)	(157,262)	(124,471)
Other changes in fair value	(236,831)	(244,730)	(149,031)
Total change in fair value	(480,476)	(401,992)	(273,502)
Balance at end of the year	949,593	1,682,016	1,599,541
Acquisition of EverBank net assets [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Servicing rights acquired, purchased or capitalized	0	0	58,680
Purchases [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Servicing rights acquired, purchased or capitalized	24,380	237,820	479,820
Servicing rights capitalized upon sales of loans [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Servicing rights acquired, purchased or capitalized	$ 198,865	306,741	$ 214,285
Corporate Joint Venture [Member] | Sale Of Servicing Rights To Walter Capital Opportunity Corp. [Member]
Servicing Assets at Fair Value [Line Items]
Servicing rights sold and accounted for as financing		$ 16,900