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Discontinued Operations - Additional Information (Details) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 02, 2016 USD ($) loan | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 20, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Percentage of controlling interest owned by the company in OMHHF |  |  |  | 83.68% |  |
Proceeds from sale of assets |  |  |  | $ 0 | $ 43,252,000 |
Dividends paid to noncontrolling interest |  |  |  | 816,000 | $ 0 |
Noncontrolling Interest |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Dividends paid to noncontrolling interest |  |  |  | $ 816,000 |  |
OMHHF |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Percentage of controlling interest owned by the company in OMHHF |  |  |  | 83.68% |  |
Non-controlling interest percent |  |  |  | 16.32% |  |
Number of loans insured by U.S. Department of Housing and Urban Development (in loans) | loan | 480 |  |  |  |  |
Disposal group, including discontinued operation, consideration |  | $ 3,800,000 |  |  |  | $ 45,000,000
Disposal group, including discontinued operation, consideration withheld |  |  |  |  |  | $ 1,400,000
Gain (loss) from disposal of discontinued operation, before income tax | $ 14,900,000 |  |  |  |  |
Dividends paid to noncontrolling interest |  |  |  | $ 816,000 |  |
Payments for Repurchase of Convertible Preferred Stock |  |  |  | $ 5,000,000 |  |
Business Pipeline of Mortgage Loans |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of assets |  | $ 1,400,000 | $ 1,500,000 |  |  |

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