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Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Loans held for sale: |  |  |  |  |
Loans held for sale, at fair value |  | $ 339,687 | $ 309,054 | $ 276,581 | $ 401,120
Loans held for investment - Reverse mortgages, at fair value |  | 3,100,000 |  |  |
Financial liabilities: |  |  |  |  |
Match funded liabilities |  | 1,431,381 | 1,584,049 |  |
Financing liabilities: |  |  |  |  |
Total Financing liabilities |  | 3,568,017 | 3,089,255 |  |
Other secured borrowings: |  |  |  |  |
Total Other secured borrowings |  | 737,512 | 762,411 |  |
Senior unsecured notes |  | 346,179 | 345,511 |  |
Mortgage servicing rights: |  |  |  |  |
Mortgage servicing rights, at fair value |  | 700,668 | 761,190 | $ 814,450 | $ 93,901
Total Mortgage servicing rights |  | 1,047,142 | 1,138,569 |  |
Carrying Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Total Loans held for sale |  | 401,790 | 414,046 |  |
Financing liabilities: |  |  |  |  |
Total Financing liabilities |  | 3,568,017 | 3,089,255 |  |
Other secured borrowings: |  |  |  |  |
Total Other secured borrowings |  | 737,512 | 762,411 |  |
Mortgage servicing rights: |  |  |  |  |
Total Mortgage servicing rights |  | 1,047,142 | 1,138,569 |  |
Fair Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Total Loans held for sale |  | 401,790 | 414,046 |  |
Financing liabilities: |  |  |  |  |
Total Financing liabilities |  | 3,535,979 | 3,065,006 |  |
Other secured borrowings: |  |  |  |  |
Total Other secured borrowings |  | 753,528 | 783,276 |  |
Mortgage servicing rights: |  |  |  |  |
Total Mortgage servicing rights |  | 1,068,619 | 1,222,745 |  |
Level 2 [Member] | Carrying Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Loans held for sale, at fair value | [1] | 339,687 | 309,054 |  |
Other secured borrowings: |  |  |  |  |
Senior secured term loan | [2],[3] | 351,703 | 377,091 |  |
Senior unsecured notes | [2],[3] | 346,179 | 345,511 |  |
Level 2 [Member] | Fair Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Loans held for sale, at fair value | [1] | 339,687 | 309,054 |  |
Other secured borrowings: |  |  |  |  |
Senior secured term loan | [2],[3] | 367,719 | 397,956 |  |
Senior unsecured notes | [2],[3] | 238,000 | 318,063 |  |
Level 3 [Member] | Carrying Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Loans held for sale, at lower of cost or fair value | [4] | 62,103 | 104,992 |  |
Loans held for investment - Reverse mortgages, at fair value | [1] | 3,057,564 | 2,488,253 |  |
Advances and match funded advances | [2] | 1,943,675 | 2,151,066 |  |
Receivables, net | [2] | 307,372 | 286,981 |  |
Mortgage-backed securities, at fair value | [1] | 9,063 | 7,985 |  |
Financial liabilities: |  |  |  |  |
Match funded liabilities | [2] | 1,431,381 | 1,584,049 |  |
Financing liabilities: |  |  |  |  |
HMBS-related borrowings, at fair value | [1] | 2,935,928 | 2,391,362 |  |
Financing liability - MSRs pledged | [1] | 495,126 | 541,704 |  |
Other | [2] | 136,963 | 156,189 |  |
Other secured borrowings: |  |  |  |  |
Other | [2] | 385,809 | 385,320 |  |
Mortgage servicing rights: |  |  |  |  |
Mortgage servicing rights, at fair value | [1] | 700,668 | 761,190 |  |
Mortgage servicing rights, at amortized cost | [2],[5] | 346,474 | 377,379 |  |
Level 3 [Member] | Fair Value [Member] |  |  |  |  |
Loans held for sale: |  |  |  |  |
Loans held for sale, at lower of cost or fair value | [4] | 62,103 | 104,992 |  |
Loans held for investment - Reverse mortgages, at fair value | [1] | 3,057,564 | 2,488,253 |  |
Advances and match funded advances | [2] | 1,943,675 | 2,151,066 |  |
Receivables, net | [2] | 307,372 | 286,981 |  |
Mortgage-backed securities, at fair value | [1] | 9,063 | 7,985 |  |
Financial liabilities: |  |  |  |  |
Match funded liabilities | [2] | 1,432,592 | 1,581,786 |  |
Financing liabilities: |  |  |  |  |
HMBS-related borrowings, at fair value | [1] | 2,935,928 | 2,391,362 |  |
Financing liability - MSRs pledged | [1] | 495,126 | 541,704 |  |
Other | [2] | 104,925 | 131,940 |  |
Other secured borrowings: |  |  |  |  |
Other | [2] | 385,809 | 385,320 |  |
Mortgage servicing rights: |  |  |  |  |
Mortgage servicing rights, at fair value | [1] | 700,668 | 761,190 |  |
Mortgage servicing rights, at amortized cost | [2],[5] | 367,951 | 461,555 |  |
Interest Rate Lock Commitments [Member] | Level 2 [Member] | Carrying Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Interest rate lock commitments | [1] | 14,576 | 6,080 |  |
Interest Rate Lock Commitments [Member] | Level 2 [Member] | Fair Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Interest rate lock commitments | [1] | 14,576 | 6,080 |  |
Forward Mortgage Backed Securities Trades [Member] | Level 1 [Member] | Carrying Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Forward mortgage-backed securities trades | [1] | (7,365) | 295 |  |
Forward Mortgage Backed Securities Trades [Member] | Level 1 [Member] | Fair Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Forward mortgage-backed securities trades | [1] | (7,365) | 295 |  |
Interest Rate Caps [Member] | Level 3 [Member] | Carrying Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Interest rate caps | [1] | 200 | 2,042 |  |
Interest Rate Caps [Member] | Level 3 [Member] | Fair Value [Member] |  |  |  |  |
Derivative financial instruments assets (liabilities): |  |  |  |  |
Interest rate caps | [1] | $ 200 | $ 2,042 |  |
[1] | Measured at fair value on a recurring basis.
[2] | Disclosed, but not carried, at fair value.
[3] | The carrying values are net of unamortized debt issuance costs and discount. See Note 11 – Borrowings for additional information.
[4] | Measured at fair value on a non-recurring basis.
[5] | The net carrying value at June 30, 2016 and December 31, 2015 is net of the valuation allowance on the impaired government-insured stratum of our amortization method MSRs, which is measured at fair value on a non-recurring basis. Before applying the valuation allowance of $56.4 million, the carrying value of this stratum at June 30, 2016 was $154.2 million. At December 31, 2015, the carrying value of this stratum was $146.5 million before applying the valuation allowance of $17.3 million.

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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- Definition 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 liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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- Definition Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Mortgage-Backed Securities -URI http://asc.fasb.org/extlink&oid=6517959 + Details
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- Definition Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13728-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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