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Schedule IV - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Mortgage Loans on Real Estate [Line Items] |  |  |
Face amount of loans | $ 1,938,589 |  |
Total loans | $ 1,925,652 | $ 1,019,702 | $ 658,583
Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.08% | 6.84% |
Face amount of loans | $ 999,583 | $ 465,574 |
Carrying Value | 994,301 | $ 458,520 |
Total commercial mortgage loans | $ 994,301 |  |
Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.34% | 11.34% |
Face amount of loans | $ 939,006 | $ 563,599 |
Carrying Value | $ 931,351 | 561,182 |
Condo Conversion - NY, NY August 2013 [Member] | Condo Conversion [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.00% |  |
Face amount of loans | $ 24,114 | 33,846 |
Carrying Value | $ 24,289 | 33,961 |
Condo Construction Potomac, MD [Member] | Condo Construction [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.50% |  |
Face amount of loans | $ 65,125 | 28,000 |
Carrying Value | $ 65,087 | 27,520 |
Vacation Home Portfolio - Various [Member] | Vacation Home Portfolio [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.50% |  |
Face amount of loans | $ 94,147 | 100,046 |
Carrying Value | $ 93,277 | 99,086 |
Hotel - Philadelphia, PA [Member] | Hotel [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 4.74% |  |
Face amount of loans | $ 34,000 | 34,000 |
Carrying Value | $ 33,994 | 33,842 |
Condo Construction Bethesda, MD [Member] | Condo Construction [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.75% |  |
Face amount of loans | $ 50,000 | 20,000 |
Carrying Value | $ 49,960 | 19,616 |
Multifamily, Brooklyn, NY [Member] | Multifamily Conversion [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 4.41% |  |
Face amount of loans | $ 34,500 | 30,000 |
Carrying Value | $ 34,886 | 30,110 |
Mixed Use - Cincinnati, OH [Member] | Mixed Use [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 9.25% |  |
Face amount of loans | $ 165,000 | 20,000 |
Carrying Value | $ 163,173 | 18,309 |
Condo Conversion New York, NY [Member] | Condo Conversion [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 3.75% |  |
Face amount of loans | $ 67,300 | 67,300 |
Carrying Value | $ 67,038 | 64,714 |
Vacation Home Portfolio - Various, United States [Member] | Vacation Home Portfolio [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.00% |  |
Face amount of loans | $ 50,000 | 50,000 |
Carrying Value | $ 49,595 | 49,508 |
Mixed Use - Brooklyn, NY [Member] | Mixed Use [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.25% |  |
Face amount of loans | $ 85,770 |  |
Carrying Value | $ 85,658 |  |
Retail Redevelopment - Miami, FL [Member] | Retail Redevelopment [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 6.25% |  |
Face amount of loans | $ 45,000 |  |
Carrying Value | $ 44,925 |  |
Retail Redevelopment - Miami, FL (2) [Member] | Retail Redevelopment [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 6.25% |  |
Face amount of loans | $ 33,000 |  |
Carrying Value | $ 32,804 |  |
Retail, Brooklyn, NY [Member] | Retail [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.25% |  |
Face amount of loans | $ 1,653 |  |
Carrying Value | $ 1,636 |  |
Hotel - NY, NY [Member] | Hotel [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 5.50% |  |
Face amount of loans | $ 98,373 |  |
Carrying Value | $ 97,381 |  |
Retail - Brooklyn, NY - November 2015 [Member] | Retail [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.25% |  |
Face amount of loans | $ 5,910 |  |
Carrying Value | $ 5,858 |  |
Hotel - U.S. Virgin Islands [Member] | Hotel [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 5.27% |  |
Face amount of loans | $ 42,000 |  |
Carrying Value | $ 41,600 |  |
Office - Richmond, VA [Member] | Office [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 5.53% |  |
Face amount of loans | $ 54,000 |  |
Carrying Value | $ 53,475 |  |
Office - Michigan [Member] | Office [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 13.00% |  |
Face amount of loans | $ 8,753 |  |
Carrying Value | $ 8,753 |  |
Mixed Use - North Carolina [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.10% |  |
Face amount of loans | $ 6,525 |  |
Carrying Value | $ 6,525 |  |
Office Complex - Missouri [Member] | Office [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.75% |  |
Face amount of loans | $ 9,566 |  |
Carrying Value | $ 9,566 |  |
Hotel Portfolio - Rochester, MN [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.00% |  |
Face amount of loans | $ 24,182 |  |
Carrying Value | $ 24,182 |  |
Warehouse Portfolio - Various [Member] | Warehouse [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.50% |  |
Face amount of loans | $ 32,000 |  |
Carrying Value | $ 32,000 |  |
Office Condo - NY, NY [Member] | Office [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.25% |  |
Face amount of loans | $ 14,000 |  |
Carrying Value | $ 13,631 |  |
Condo Conversion - NY, NY September 2015 [Member] | Condo Conversion [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 7.00% |  |
Face amount of loans | $ 6,386 |  |
Carrying Value | $ 6,415 |  |
Mixed Use - Various [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 14.00% |  |
Face amount of loans | $ 19,500 |  |
Carrying Value | $ 19,377 |  |
Mixed Use - London, England [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.25% |  |
Face amount of loans | $ 50,676 |  |
Carrying Value | $ 50,676 |  |
Healthcare Portfolio - Various [Member] | Healthcare [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 9.47% |  |
Face amount of loans | $ 39,223 |  |
Carrying Value | $ 39,223 |  |
Ski Resort Montana [Member] | Ski Resort [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 14.00% |  |
Face amount of loans | $ 15,000 |  |
Carrying Value | $ 14,878 |  |
Mixed Use - New York, NY [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.69% |  |
Face amount of loans | $ 88,368 |  |
Carrying Value | $ 87,818 |  |
Senior Housing - United Kingdom [Member] | Senior Housing Facility [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 8.83% |  |
Face amount of loans | $ 79,735 |  |
Carrying Value | $ 79,735 |  |
Hotel - Burbank, CA [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.40% |  |
Face amount of loans | $ 20,000 |  |
Carrying Value | $ 20,000 |  |
Multifamily Portfolio - Florida [Member] | Multifamily Portfolio [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.70% |  |
Face amount of loans | $ 22,000 |  |
Carrying Value | $ 21,895 |  |
Multifamily Portfolio - Florida (2) [Member] | Multifamily Portfolio [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.70% |  |
Face amount of loans | $ 15,500 |  |
Carrying Value | $ 15,426 |  |
Mixed Use - Various, May 2017 [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 9.30% |  |
Face amount of loans | $ 45,000 |  |
Carrying Value | $ 44,854 |  |
Hotel - Phoenix, AZ [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.50% |  |
Face amount of loans | $ 25,000 |  |
Carrying Value | $ 25,000 |  |
Hotel - Washington D.C. [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 9.80% |  |
Face amount of loans | $ 20,000 |  |
Carrying Value | $ 19,934 |  |
Condo Development - New York, NY [Member] | Condo Development [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 13.00% |  |
Face amount of loans | $ 34,184 |  |
Carrying Value | $ 33,567 |  |
Condo Conversion, New York, NY, August 2018 [Member] | Condo Conversion [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 12.75% |  |
Face amount of loans | $ 52,418 |  |
Carrying Value | $ 51,941 |  |
Mixed Use, New York, NY, March 2017 [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.25% |  |
Face amount of loans | $ 12,347 |  |
Carrying Value | $ 12,222 |  |
Mixed Use, New York, NY, October 2018 [Member] | Mixed Use [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.50% |  |
Face amount of loans | $ 30,000 |  |
Carrying Value | $ 29,785 |  |
Hotel, New York, NY, September 2018 [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 5.50% |  |
Face amount of loans | $ 2,595 |  |
Carrying Value | $ 2,458 |  |
Destination Resort, Various [Member] | Destination Resort [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 9.10% |  |
Face amount of loans | $ 75,000 |  |
Carrying Value | $ 71,362 |  |
Multifamily, New York, New York [Member] | Multifamily Portfolio [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 10.75% |  |
Face amount of loans | $ 55,000 |  |
Carrying Value | $ 54,558 |  |
Hotel, New York, NY - December 2015 [Member] | Hotel [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 12.36% |  |
Face amount of loans | $ 50,000 |  |
Carrying Value | $ 49,522 |  |
Condo Pre-development, United Kingdom [Member] | Condo Development [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 11.14% |  |
Face amount of loans | $ 81,048 |  |
Carrying Value | $ 81,048 |  |
Multifamily - Williston, ND [Member] | Multifamily Conversion [Member] | Commercial mortgage loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 6.15% |  |
Face amount of loans | $ 49,691 | 57,792 |
Carrying Value | $ 49,665 | $ 57,297 |
Multifamily - Williston, ND [Member] | Multifamily Portfolio [Member] | Subordinate Loans [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Interest Rate | 6.15% |  |
Face amount of loans | $ 5,000 |  |
Carrying Value | $ 5,000 |  |

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