Goodwill and Intangible Assets, Net - Summary of Reporting Units (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 01, 2014
Goodwill [Line Items]
Goodwill	$ 575,468	$ 657,737	$ 580,378
Servicing [Member]
Goodwill [Line Items]
Goodwill		432,267	431,455
Servicing [Member] | Goodwill Impairment Test Under Step One [Member]
Goodwill [Line Items]
Goodwill	432,267			432,267
% Excess Fair Value Over Carrying Value				18.00%
Originations [Member]
Goodwill [Line Items]
Goodwill		47,747	0
Originations [Member] | Goodwill Impairment Test Under Step One [Member]
Goodwill [Line Items]
Goodwill	47,747			47,747
% Excess Fair Value Over Carrying Value				8.00%
Asset Receivables Management (ARM) [Member]
Goodwill [Line Items]
Goodwill		34,518	34,518
Asset Receivables Management (ARM) [Member] | Goodwill Impairment Test Under Step One [Member]
Goodwill [Line Items]
Goodwill	$ 34,518			$ 34,518
% Excess Fair Value Over Carrying Value				23.00%