Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of liability recognized arising from contingent consideration in a business combination.

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-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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-Name Accounting Standards Codification

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-Paragraph 10

-Subparagraph (a)

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-Topic 825

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-Paragraph 15

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-Topic 210

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-Paragraph 10

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value of financial and nonfinancial obligations.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Glossary Loan

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

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Beneficial interest at fair value.

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Home equity conversion mortgage backed security related obligations.

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Mandatory repurchase obligation.

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Professional fees liability related to certain securitizations.

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Fair Value - Summary of Assets and Liabilities in Each Level of Fair Value Hierarchy (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Assets
Assets, Fair Value	$ 10,172,160		$ 6,710,211
Assets, Fair Value	45,849		53,975
Assets, Fair Value	1,006,031		0
Assets, Fair Value	115,920		949
Assets, Fair Value	11,339,960		6,765,135
Liabilities
Liabilities, Fair Value	77,882		1,102
Mandatory repurchase obligation	8,285		9,999
Professional fees liability related to certain securitizations	6,985		8,147
Contingent earn-out payments	6,650	10,900	6,100
Liabilities, Fair Value	708,013		757,286
Liabilities, Fair Value	8,132,753		5,874,552
Liabilities, Fair Value	8,940,568		6,657,186
Reverse Loans [Member]
Assets
Assets, Fair Value	8,137,815		6,047,108
Residential Loans Related to Non-Residual Trusts [Member]
Assets
Assets, Fair Value	609,399		646,498
Forward Loans Held for Sale [Member]
Assets
Assets, Fair Value	1,424,946		16,605
Level 1 [Member]
Assets
Assets, Fair Value
Assets, Fair Value
Assets, Fair Value
Assets, Fair Value
Liabilities
Liabilities, Fair Value
Mandatory repurchase obligation
Professional fees liability related to certain securitizations
Contingent earn-out payments
Liabilities, Fair Value
Liabilities, Fair Value
Liabilities, Fair Value
Level 1 [Member] \| Reverse Loans [Member]
Assets
Assets, Fair Value
Level 1 [Member] \| Residential Loans Related to Non-Residual Trusts [Member]
Assets
Assets, Fair Value
Level 1 [Member] \| Forward Loans Held for Sale [Member]
Assets
Assets, Fair Value
Level 2 [Member]
Assets
Assets, Fair Value
Assets, Fair Value
Assets, Fair Value	19,776
Assets, Fair Value	1,444,722		16,605
Liabilities
Liabilities, Fair Value	77,882		1,102
Mandatory repurchase obligation
Professional fees liability related to certain securitizations
Contingent earn-out payments
Liabilities, Fair Value
Liabilities, Fair Value
Liabilities, Fair Value	77,882		1,102
Level 2 [Member] \| Reverse Loans [Member]
Assets
Assets, Fair Value
Level 2 [Member] \| Residential Loans Related to Non-Residual Trusts [Member]
Assets
Assets, Fair Value
Level 2 [Member] \| Forward Loans Held for Sale [Member]
Assets
Assets, Fair Value	1,424,946		16,605
Level 3 [Member]
Assets
Assets, Fair Value	45,849		53,975
Assets, Fair Value	1,006,031
Assets, Fair Value	96,144		949
Assets, Fair Value	9,895,238		6,748,530
Liabilities
Liabilities, Fair Value
Mandatory repurchase obligation	8,285		9,999
Professional fees liability related to certain securitizations	6,985		8,147
Contingent earn-out payments	6,650		6,100
Liabilities, Fair Value	708,013		757,286
Liabilities, Fair Value	8,132,753		5,874,552
Liabilities, Fair Value	8,862,686		6,656,084
Level 3 [Member] \| Reverse Loans [Member]
Assets
Assets, Fair Value	8,137,815		6,047,108
Level 3 [Member] \| Residential Loans Related to Non-Residual Trusts [Member]
Assets
Assets, Fair Value	609,399		646,498
Level 3 [Member] \| Forward Loans Held for Sale [Member]
Assets
Assets, Fair Value