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Residential Mortgage Loans, At Fair Value | 3 Months Ended
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Mar. 31, 2018
Mortgage Loans on Real Estate [Abstract] |
Residential Mortgage Loans, at Fair Value | Residential Mortgage Loans, At Fair Value Certain of the Company’s residential mortgage loans, including distressed residential mortgage loans and second mortgages, are presented at fair value on its condensed consolidated balance sheets as a result of a fair value election made at time of acquisition. Subsequent changes in fair value are reported in current period earnings and presented in net loss on residential mortgage loans at fair value on the Company’s condensed consolidated statements of operations. The Company’s residential mortgage loans at fair value consist of the following as of March 31, 2018 and December 31, 2017, respectively (dollar amounts in thousands):
|  | Principal |  | Premium/(Discount) |  | Unrealized Gains/(Losses) |  | Carrying Value
March 31, 2018 |  | $ | 104,394 |  |  | $ | (4,667 | ) |  | $ | (247 | ) |  | $ | 99,480 |
December 31, 2017 |  | $ | 92,105 |  |  | $ | (4,911 | ) |  | $ | (41 | ) |  | $ | 87,153 |
As of March 31, 2018, the company is committed to purchase $5.3 million of second mortgage loans from originators. The following table presents the components of net loss on residential mortgage loans at fair value for the three months ended March 31, 2018 and 2017, respectively (dollar amounts in thousands):
| March 31, 2018 |  | March 31, 2017
Net realized gain on payoff and sale of loans | $ | 40 |  |  | $ | — |
Net unrealized losses | (206 | ) |  | — |
The geographic concentrations of credit risk exceeding 5% of the unpaid principal balance of residential mortgage loans at fair value as of March 31, 2018 and December 31, 2017, respectively, are as follows:
| March 31, 2018 |  | December 31, 2017
California | 36.4 | % |  | 35.9 | %
New Jersey | 7.9 | % |  | 7.7 | %
Florida | 6.6 | % |  | 6.6 | %
The following table presents the difference between the fair value and the aggregate unpaid principal balance of the Company's residential mortgage loans at fair value greater than 90 days past due and in nonaccrual status at March 31, 2018 and December 31, 2017, respectively (dollar amounts in thousands):
| Fair Value |  | Unpaid Principal Balance |  | Difference
March 31, 2018 | $ | 1,336 |  |  | $ | 1,543 |  |  | $ | (207 | )
December 31, 2017 | 1,048 |  |  | 1,214 |  |  | (166 | )

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