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Consolidated K-Series (Tables) | 12 Months Ended
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Dec. 31, 2017
Variable Interest Entity [Line Items] |
Schedule of Geographic Concentration Risk Exceeding 5% | The geographic concentrations of credit risk exceeding 5% of the total loan balances in our residential mortgage loans held in securitization trusts and REO held in residential securitization trusts at December 31, 2017 and December 31, 2016 are as follows:
| December 31, 2017 |  | December 31, 2016
New York | 31.8 | % |  | 33.8 | %
Massachusetts | 20.7 | % |  | 19.9 | %
New Jersey | 11.9 | % |  | 10.8 | %
Florida | 8.8 | % |  | 8.9 | %
Connecticut | 7.3 | % |  | 7.4 | %
Maryland | 5.2 | % |  | 5.1 | %
The geographic concentrations of credit risk exceeding 5% of the unpaid principal balance of residential mortgage loans at fair value as of December 31, 2017 and December 31, 2016, respectively, are as follows:
| December 31, 2017 |  | December 31, 2016
California | 35.9 | % |  | 63.3 | %
New Jersey | 7.7 | % |  | 2.5 | %
Florida | 6.6 | % |  | 5.6 | %
Multi-family loans held in securitization trusts |
Variable Interest Entity [Line Items] |
Schedule of Geographic Concentration Risk Exceeding 5% | The geographic concentrations of credit risk exceeding 5% of the total loan balances related to our CMBS investments included in investment securities available for sale and multi-family loans held in securitization trusts as of December 31, 2017 and December 31, 2016, respectively, are as follows:
| December 31, 2017 |  | December 31, 2016
California | 14.7 | % |  | 13.8 | %
Texas | 12.7 | % |  | 12.4 | %
New York | 6.5 | % |  | 8.1 | %
Maryland | 5.5 | % |  | 5.3 | %
Consolidated K-Series |
Variable Interest Entity [Line Items] |
Condensed Balance Sheet | The condensed consolidated balance sheets of the Consolidated K-Series at December 31, 2017 and December 31, 2016, respectively, are as follows (dollar amounts in thousands):
Balance Sheets | December 31, 2017 |  | December 31, 2016
Assets |  |  |
Multi-family loans held in securitization trusts | $ | 9,657,421 |  |  | $ | 6,939,844 |
Receivables | 33,562 |  |  | 24,098 |
Total Assets | $ | 9,690,983 |  |  | $ | 6,963,942 |
Liabilities and Equity |  |  |
Multi-family CDOs | $ | 9,189,459 |  |  | $ | 6,624,896 |
Accrued expenses | 33,136 |  |  | 24,003 |
Total Liabilities | 9,222,595 |  |  | 6,648,899 |
Equity | 468,388 |  |  | 315,043 |
Total Liabilities and Equity | $ | 9,690,983 |  |  | $ | 6,963,942 |
Condensed Income Statement | The condensed consolidated statements of operations of the Consolidated K-Series for the years ended December 31, 2017, 2016, and 2015, respectively, are as follows (dollar amounts in thousands):
| Years Ended December 31,
Statements of Operations | 2017 |  | 2016 |  | 2015
Interest income | $ | 297,124 |  |  | $ | 249,191 |  |  | $ | 257,417 |
Interest expense | 261,665 |  |  | 222,553 |  |  | 232,971 |
Net interest income | 35,459 |  |  | 26,638 |  |  | 24,446 |
Unrealized gain on multi-family loans and debt held in securitization trusts, net | 18,872 |  |  | 3,032 |  |  | 12,368 |
Net income | $ | 54,331 |  |  | $ | 29,670 |  |  | $ | 36,814 |

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