Acquisitions - Estimate of Identifiable Intangible Assets Recognized at Acquisition with Corresponding Weighted-Average Amortization Periods (Detail) (ResCap Acquisition [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 25,100
Weighted- Average Amortization Period (in years)	4 years 7 months 6 days
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	8,000
Weighted- Average Amortization Period (in years)	8 years
Capitalized Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 17,100
Weighted- Average Amortization Period (in years)	3 years