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Debt - Narrative (Details) |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 77 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 25, 2019 | Nov. 19, 2018 USD ($) | Aug. 18, 2017 USD ($) | Apr. 25, 2017 USD ($) | Jun. 30, 2020 USD ($) securitization $ / shares | Mar. 31, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) Facility Day securitization $ / shares | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2020 USD ($) securitization $ / shares | Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interests in joint venture |  |  |  |  | 34.00% |  |  | 34.00% |  |  | 34.00% |
Percentage of guarantors beneficial interest |  |  |  |  | 100.00% |  |  | 100.00% |  |  | 100.00% |
Number of securitizations completed | securitization |  |  |  |  |  |  |  |  |  |  | 15 |
Number of securitizations outstanding | securitization |  |  |  |  | 6 |  |  | 6 |  |  | 6 |
Percentage of interests in trust certificates sold to third parties |  |  |  |  |  |  |  | 50.00% |  |  |  |
Interest expense |  |  |  |  | $ 13,058,000 |  | $ 15,439,000 | $ 26,128,000 | $ 31,124,000 |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  | $ 3,200,000 |  |
Percentage of ownership interests in joint venture |  |  |  |  | 34.00% |  |  | 34.00% |  |  | 34.00% |
Debt Instrument, Basis Spread on Variable Rate | 100.00% |  |  |  |  |  |  |  |  |  |  |
Collateralized Financings |  |  |  |  | $ 7,632,000 | $ 32,400,000 |  | $ 7,632,000 |  |  | $ 7,632,000 | $ 4,117,000
Increase (Decrease) in Margin Deposits Outstanding |  |  |  |  |  | $ 28,200,000 |  |  |  |  |  |
Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Period after issue |  |  |  |  |  |  |  | 36 months |  |  |  |
Mortgage loans |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of securitizations outstanding | securitization |  |  |  |  | 6 |  |  | 6 |  |  | 6 |
Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  | $ 87,500,000 |  |  |  |  |  |  |  |
Interest Rate |  |  | 7.25% | 7.25% | 7.25% |  |  | 7.25% |  |  | 7.25% |
Proceeds from sale of convertible senior notes |  |  | $ 20,500,000 | $ 84,900,000 |  |  |  |  |  |  |  |
Conversion premium - Convertible senior notes |  |  | 200,000 | $ 2,500,000 |  |  |  |  |  |  |  |
Percentage of notes convertible to common stock |  |  |  | 17.50% |  |  |  |  |  |  |  |
Additional aggregate principal |  | $ 15,900,000 | $ 20,500,000 |  |  |  |  |  |  |  |  |
Conversion premium |  |  | 6.00% |  |  |  |  |  |  |  |  |
Principal amount of note (in dollars per share) | $ / shares |  |  |  |  | $ 25.00 |  |  |  |  |  |  |
If-converted value in excess of principal |  |  |  |  |  |  |  | $ 42,200,000 |  |  |  |
Threshold percentage of stock price trigger (at least) |  |  |  |  |  |  |  | 130.00% |  |  |  |
Threshold trading days (at least) | Day |  |  |  |  |  |  |  | 20 |  |  |  |
Threshold consecutive trading days | Day |  |  |  |  |  |  |  | 30 |  |  |  |
Redemption price, percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |
Unamortized discount |  |  |  |  | $ 4,100,000 |  |  | $ 4,100,000 |  |  | $ 4,100,000 |
Amortization of debt discount |  |  |  |  | $ 400,000 |  |  | $ 700,000 |  |  |  |
Interest rate, effective percentage |  |  |  |  | 9.09% |  |  | 9.09% |  |  | 9.09% |
Master Repurchase Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 3.29% |  |  | 3.29% |  |  | 3.29% | 3.77%
Master Repurchase Agreement | Delaware Trust | Mortgage loans |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of facilities repurchased | Facility |  |  |  |  |  |  |  | 2 |  |  |  |
Number of wholly-owned Delaware trusts | Facility |  |  |  |  |  |  |  | 2 |  |  |  |
Number of counterparties | Facility |  |  |  |  |  |  |  | 2 |  |  |  |
Ceiling for each repurchase facility |  |  |  |  | $ 250,000,000.0 |  |  | $ 250,000,000.0 |  |  | $ 250,000,000.0 |
Master Repurchase Agreement | Delaware Trust | Mortgage loans | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase price for each mortgage loan or REO |  |  |  |  |  |  |  | 70.00% |  |  |  |
Master Repurchase Agreement | Delaware Trust | Mortgage loans | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of purchase price for each mortgage loan or REO |  |  |  |  |  |  |  | 85.00% |  |  |  |
Master Repurchase Agreement | Delaware Trust | Mortgages One |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ceiling for each repurchase facility |  |  |  |  | 400,000,000.0 |  |  | $ 400,000,000.0 |  |  | 400,000,000.0 |
Master Repurchase Agreement | Delaware Trust | Bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of facilities repurchased | Facility |  |  |  |  |  |  |  | 3,000 |  |  |  |
Gregory |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ceiling for each repurchase facility |  |  |  |  | $ 12,000,000.0 |  |  | $ 12,000,000.0 |  |  | $ 12,000,000.0 |
Gregory | Servicing Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Servicing fees percentage |  |  |  |  |  |  |  | 0.42% |  |  |  |
Gregory | Servicing Agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Servicing fees percentage |  |  |  |  |  |  |  | 0.65% |  |  |  |
Gregory | Servicing Agreement | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Servicing fees percentage |  |  |  |  |  |  |  | 1.25% |  |  |  |
Common Stock | Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate |  |  |  |  | 1.7279 |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  |  |  |  | $ 14.47 |  |  | $ 14.47 |  |  | $ 14.47 |
2018-C | Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Interest retained by the Company |  |  |  |  |  |  |  | 5.00% |  |  |  |
2018-C | Mortgage loans | Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  |  | $ 138,600,000 |  |  | $ 138,600,000 |  |  | $ 138,600,000 | $ 148,500,000
2018-C | Mortgage loans | Class B Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  |  | 15,900,000 |  |  | $ 15,900,000 |  |  | 15,900,000 | 15,900,000
Ajax Mortgage Loan Trust 2018 C September 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Interests Sold to Third Parties |  |  |  |  |  |  |  | 37.00% |  |  |  |
Ajax Mortgage Loan Trust 2018 C September 2018 | Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Interests Sold to Third Parties |  |  |  |  |  |  |  | 95.00% |  |  |  |
Ajax Mortgage Loan Trust 2018 C September 2018 | Mortgage loans | Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  |  | $ 170,500,000 |  |  | $ 170,500,000 |  |  | $ 170,500,000 |
Interest Rate |  |  |  |  | 4.36% |  |  | 4.36% |  |  | 4.36% |
Ajax Mortgage Loan Trust 2018 C September 2018 | Mortgage loans | Class B Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  |  | $ 15,900,000 |  |  | $ 15,900,000 |  |  | $ 15,900,000 |
Interest Rate |  |  |  |  | 5.25% |  |  | 5.25% |  |  | 5.25% |
2017-C |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Period after issue |  |  |  |  |  |  |  | 48 months |  |  |  |
2017-D |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 300.00% |  |  |  |  |  |  |  |  |  |  |
2017-D | Mortgage loans | Class A Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  |  |  |  | $ 110,000,000.0 |  |  | $ 110,000,000.0 |  |  | $ 110,000,000.0 | $ 121,900,000
Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal |  | $ 108,000,000.0 |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 7.25% |  |  |  |  |  |  |  |  |  |
Proceeds from sale of convertible senior notes |  | $ 15,200,000 |  |  |  |  |  |  |  |  |  |
Conversion premium - Convertible senior notes |  | $ 500,000 |  |  |  |  |  |  |  |  |  |
Conversion premium |  | 11.43% |  |  |  |  |  |  |  |  |  |
Unpaid principal balance |  |  |  |  | 115,900,000 |  |  | 115,900,000 |  |  | $ 115,900,000 |
Interest expense |  |  |  |  | $ 2,500,000 |  |  | $ 4,900,000 |  |  |  |

X
- Definition Represents the difference between the price of the convertible and the greater of the conversion or straight-bond value. + References No definition available. + Details
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- Definition Represents the debt instrument convertible principal amount per share. + References No definition available. + Details
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- Definition Debt Instrument, Percentage Of Notes Convertible To Common Stock + References No definition available. + Details
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- Definition Represents the value of unpaid principal balance. + References No definition available. + Details
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- Definition Line Of Credit Facility, Additional Borrowing Capacity + References No definition available. + Details
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- Definition Represents the number of facilities repurchased. + References No definition available. + Details
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- Definition Number Of Securitizations Completed + References No definition available. + Details
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- Definition Number Of Securitizations Outstanding + References No definition available. + Details
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- Definition Number Of Wholly-Owned Delaware Trusts + References No definition available. + Details
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- Definition Represents the percentage of acquisition purchase price for each mortgage loan or real estate owned. + References No definition available. + Details
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- Definition Represents percentage of guarantors beneficial interest. + References No definition available. + Details
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- Definition Percentage Of Ownership Interests In Joint Venture + References No definition available. + Details
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- Definition Percentage of Interest retained by the Company + References No definition available. + Details
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- Definition Percentage of Interests Sold to Third Parties + References No definition available. + Details
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- Definition Percentage of Interests in Trust Certificates Sold to Third Parties + References No definition available. + Details
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- Definition This represents Proceeds from sale of convertible senior notes + References No definition available. + Details
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- Definition Represents percentage related to servicing fee rate of unpaid principal balance for mortgage loans. + References No definition available. + Details
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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from recognition of deferred taxes for convertible debt with a beneficial conversion feature. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=117331294&loc=d3e34017-109320 + Details
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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The value of the collateral (typically cash) that the entity receives in a financing transaction in exchange for securities lent. This item represents a liability in the financial statements of the lender of the securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109249708&loc=d3e113275-111724 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870 + Details
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- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870 + Details
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- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature. + References No definition available. + Details
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- Definition Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion. + References No definition available. + Details
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- Definition Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. + References No definition available. + Details
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