Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended		3 Months Ended		0 Months Ended	10 Months Ended	0 Months Ended		2 Months Ended	12 Months Ended
	Oct. 30, 2013	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 10, 2013	Dec. 31, 2013	Jan. 31, 2013	Dec. 31, 2014	Dec. 31, 2012	Mar. 01, 2013	Dec. 31, 2013	Jan. 31, 2013	Nov. 01, 2012	Dec. 31, 2012	Dec. 31, 2012	May 01, 2014
Business Acquisition [Line Items]
Residential Loans of Securitization Trusts, Principal Balance			$ 256,112,142,000	$ 217,961,136,000		$ 217,961,136,000		$ 256,112,142,000			$ 217,961,136,000
Goodwill			575,468,000	657,737,000		657,737,000		575,468,000	580,378,000		657,737,000			580,378,000	580,378,000
Acquisition related escrow funds payable to sellers			10,236,000	19,620,000		19,620,000		10,236,000			19,620,000
Business Combination, Contingent Consideration, Liability				10,900,000		10,900,000					10,900,000
EverBank Financial Corp [Member]
Business Acquisition [Line Items]
Estimated Purchase Price	83,400,000
Payments to Acquire Businesses, Gross	16,700,000	44,700,000	152,500,000
Residential Loans of Securitization Trusts, Principal Balance		16,500,000,000
Servicing assets recorded		58,700,000	58,680,000	0
Business Combination, Acquired Receivables, Gross Contractual Amount																163,200,000
Business Combination, Acquisition Related Costs			700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets																223,706,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities																924,000
Servicing rights																58,680,000
EverBank Financial Corp [Member] | Computer Software, Intangible Asset [Member]
Business Acquisition [Line Items]
Estimated Purchase Price	1,900,000
M S R Purchase [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			161,800,000			165,000,000
Residential Loans of Securitization Trusts, Principal Balance		27,600,000,000
Mortgage servicing rights purchase price					330,000,000
Accrued Liabilities			3,200,000					3,200,000
ResCap Net Assets [Member]
Business Acquisition [Line Items]
Estimated Purchase Price							479,200,000					479,200,000
Payments to Acquire Businesses, Gross							477,000,000		15,000,000
Residential Loans of Securitization Trusts, Principal Balance							42,300,000,000					42,300,000,000
Servicing assets recorded			0	242,604,000
Payments for (Proceeds from) Previous Acquisition								12,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							491,400,000					491,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							12,200,000					12,200,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Servicer And Protective Advances							175,100,000					175,100,000
Servicing rights							242,600,000					242,600,000
Goodwill							47,600,000					47,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							25,100,000					25,100,000
Ally Bank Net Assets [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross										100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets										1,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities										1,400,000
Goodwill										100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill										1,200,000
Res Cap Net Assets and Ally Bank Net Assets [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs											3,000,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual											743,500,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual											195,100,000
Bank of America Asset Purchase [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount							84,400,000,000					84,400,000,000
Business Combination, Consideration Transferred												495,700,000
Servicer Advance Purchased Under Asset Purchase Agreement												740,700,000
Reverse Mortgage Solutions Inc [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross													95,000,000
Business Combination, Acquisition Related Costs														2,800,000
Business Combination, Consideration Transferred													136,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets													5,600,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities													5,500,000,000
Goodwill													130,000,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual														13,600,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual														1,900,000
Stock Issued During Period, Value, Acquisitions													41,300,000
Acquisition related escrow funds payable to sellers			9,000,000					9,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets													5,300,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities													5,300,000,000
Security One Lending [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross															20,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets									128,400,000					128,400,000	128,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									102,300,000					102,300,000	102,300,000
Goodwill									8,800,000					8,800,000	8,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets									98,400,000					98,400,000	98,400,000
Business Combination, Contingent Consideration, Liability									10,900,000					10,900,000	10,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities									$ 89,400,000					$ 89,400,000	$ 89,400,000