Goodwill and Intangible Assets, Net - Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule Of Goodwill By Segment [Line Items]
Goodwill, Gross					$ 575,468
Goodwill, Impairment Loss	$ (56,539)	$ (82,269)	$ (56,539)	$ (82,269)
Goodwill	518,929		518,929		575,468
Reverse Mortgage [Member]
Schedule Of Goodwill By Segment [Line Items]
Goodwill, Gross					56,539
Goodwill, Impairment Loss			(56,539)
Goodwill	0		0
Originations [Member]
Schedule Of Goodwill By Segment [Line Items]
Goodwill, Gross					47,747
Goodwill	47,747		47,747
Servicing [Member]
Schedule Of Goodwill By Segment [Line Items]
Goodwill, Gross					$ 471,182
Goodwill	$ 471,182		$ 471,182