LOANS HELD FOR INVESTMENT - Investment Portfolio (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019 USD ($) extension_option	Dec. 31, 2018 USD ($)	Mar. 08, 2019 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 1,692,894	$ 1,534,743
Carrying Amount		$ 1,682,498	$ 1,524,873
Unleveraged Effective Yield		6.80%	7.10%
Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of extension pptions | extension_option		1
Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of extension pptions | extension_option		2
Extension period of maturity date		12 months
Residential
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Amount		$ 40,900	$ 34,000
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.25% Due February 2021 | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		100,600
Carrying Amount		$ 99,900
Unleveraged Effective Yield		7.80%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.25% Due February 2021 | LIBOR | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.25%
Senior Mortgage Loans | FLORIDA | LIBOR 4.75% Due February 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 89,700
Carrying Amount		$ 89,600
Unleveraged Effective Yield		6.80%
Senior Mortgage Loans | FLORIDA | LIBOR 4.75% Due February 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.75%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 6.10% Due October 2022 | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 52,500
Carrying Amount		$ 52,000
Unleveraged Effective Yield		8.80%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 6.10% Due October 2022 | LIBOR | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		6.10%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.75%, Due February 2020, Instrument 2 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 45,400
Carrying Amount		$ 45,300
Unleveraged Effective Yield		6.80%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.75%, Due February 2020, Instrument 2 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.75%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 2.60%, Due January 2022 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 42,400
Carrying Amount		$ 42,100
Unleveraged Effective Yield		5.50%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 2.60%, Due January 2022 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		2.60%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 3.25%,Due August 2022 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 22,000
Carrying Amount		$ 21,800
Unleveraged Effective Yield		5.90%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 3.25%,Due August 2022 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.25%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 3.50%, Due March 2022 | Self Storage
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 19,500
Carrying Amount		$ 19,400
Unleveraged Effective Yield		6.00%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 3.50%, Due March 2022 | LIBOR | Self Storage
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.50%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.00%, Due November 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 19,200
Carrying Amount		$ 19,100
Unleveraged Effective Yield		6.10%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.00%, Due November 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.00%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.30%, Due April 2020 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 18,400
Carrying Amount		$ 18,400
Unleveraged Effective Yield		6.60%
Senior Mortgage Loans | FLORIDA | LIBOR Plus 4.30%, Due April 2020 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.30%
Senior Mortgage Loans | TEXAS | LIBOR Plus 2.85% Due October 2022 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 75,000
Carrying Amount		$ 74,700
Unleveraged Effective Yield		5.00%
Senior Mortgage Loans | TEXAS | LIBOR Plus 2.85% Due October 2022 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		2.85%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.30%, Due December 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 42,700
Carrying Amount		$ 42,600
Unleveraged Effective Yield		5.40%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.30%, Due December 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.30%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4.75%, Due Jan 2021 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 41,000
Carrying Amount		$ 40,800
Unleveraged Effective Yield		7.10%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4.75%, Due Jan 2021 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.75%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.75%, Due September 2022 | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 33,800
Carrying Amount		$ 33,400
Unleveraged Effective Yield		6.70%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.75%, Due September 2022 | LIBOR | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.75%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.20%, Due October 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 27,500
Carrying Amount		$ 27,400
Unleveraged Effective Yield		5.50%
Senior Mortgage Loans | TEXAS | LIBOR Plus 3.20%, Due October 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.20%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4.10%, Due January 2021 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 24,000
Carrying Amount		$ 23,900
Unleveraged Effective Yield		6.40%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4.10%, Due January 2021 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.10%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4. 05%, Due November 2021 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 13,100
Carrying Amount		$ 12,800
Unleveraged Effective Yield		7.50%
Senior Mortgage Loans | TEXAS | LIBOR Plus 4. 05%, Due November 2021 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.05%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.75%, Due December 2020 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 69,200
Carrying Amount		$ 69,000
Unleveraged Effective Yield		6.10%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.75%, Due December 2020 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.75%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.95%, Due June 2021 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 57,000
Carrying Amount		$ 56,800
Unleveraged Effective Yield		6.30%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.95%, Due June 2021 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.95%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.50%, Due November 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 39,200
Carrying Amount		$ 39,000
Unleveraged Effective Yield		6.50%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.50%, Due November 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.50%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 4.40%, Due May 2021 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 32,900
Carrying Amount		$ 32,700
Unleveraged Effective Yield		6.80%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 4.40%, Due May 2021 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.40%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.80% Due January 2023 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 27,500
Carrying Amount		$ 27,200
Unleveraged Effective Yield		6.20%
Senior Mortgage Loans | ILLINOIS | LIBOR Plus 3.80% Due January 2023 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.80%
Senior Mortgage Loans | OREGON/WASHINGTON | LIBOR Plus 3.45%, Due May 2021 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 68,100
Carrying Amount		$ 67,700
Unleveraged Effective Yield		5.90%
Senior Mortgage Loans | OREGON/WASHINGTON | LIBOR Plus 3.45%, Due May 2021 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.45%
Senior Mortgage Loans | Diversified | LIBOR Plus 3.60%, Due September 2021 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 58,900
Carrying Amount		$ 58,600
Unleveraged Effective Yield		6.20%
Senior Mortgage Loans | Diversified | LIBOR Plus 3.60%, Due September 2021 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.60%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.25% Due March 2021 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 49,600
Carrying Amount		$ 49,000
Unleveraged Effective Yield		8.60%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.25% Due March 2021 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.25%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.05%, Due March 2024 | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 34,800
Carrying Amount		$ 34,600
Unleveraged Effective Yield		6.10%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.05%, Due March 2024 | LIBOR | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.05%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 3.15%, Due Feb 2022 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 30,000
Carrying Amount		$ 29,800
Unleveraged Effective Yield		5.90%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 3.15%, Due Feb 2022 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.15%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 3 .51% Percent May 2023 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 13,200
Carrying Amount		$ 13,000
Unleveraged Effective Yield		6.70%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 3 .51% Percent May 2023 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.51%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.00%, Due November 2022 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 8,600
Carrying Amount		$ 8,500
Unleveraged Effective Yield		6.70%
Senior Mortgage Loans | NORTH CAROLINA | LIBOR Plus 4.00%, Due November 2022 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.00%
Senior Mortgage Loans | CALIFORNIA | Residential
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 11,600
Carrying Amount		$ 11,500
Fixed interest rate		13.00%
Unleveraged Effective Yield		22.50%
Senior Mortgage Loans | CALIFORNIA | Residential | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fixed interest rate		12.00%
Senior Mortgage Loans | CALIFORNIA | Residential | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fixed interest rate		13.00%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.00%, Due April 2021 | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 49,000
Carrying Amount		$ 48,800
Unleveraged Effective Yield		6.30%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.00%, Due April 2021 | LIBOR | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.00%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.95%, Due July 2020 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 41,700
Carrying Amount		$ 41,700
Unleveraged Effective Yield		6.30%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.95%, Due July 2020 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.95%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.12%, Due January 2021 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 40,000
Carrying Amount		$ 39,900
Unleveraged Effective Yield		6.20%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.12%, Due January 2021 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.12%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.35% Due November 2022 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 30,900
Carrying Amount		$ 30,600
Unleveraged Effective Yield		6.00%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.35% Due November 2022 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.35%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.85%, Due July 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 26,800
Carrying Amount		$ 26,700
Unleveraged Effective Yield		6.10%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.85%, Due July 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.85%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.50% Due December 2021 | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 21,000
Carrying Amount		$ 20,800
Unleveraged Effective Yield		7.40%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 4.50% Due December 2021 | LIBOR | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.50%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.40%, Due November 2021 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 17,700
Carrying Amount		$ 17,600
Unleveraged Effective Yield		6.30%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.40%, Due November 2021 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.40%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.75%, Due March 2023 | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 12,700
Carrying Amount		$ 12,600
Unleveraged Effective Yield		6.30%
Senior Mortgage Loans | CALIFORNIA | LIBOR Plus 3.75%, Due March 2023 | LIBOR | Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.75%
Senior Mortgage Loans | GEORGIA | LIBOR Plus 3.05% Due December 2022 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 36,900
Carrying Amount		$ 36,300
Unleveraged Effective Yield		5.80%
Senior Mortgage Loans | GEORGIA | LIBOR Plus 3.05% Due December 2022 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.05%
Senior Mortgage Loans | KANSAS | LIBOR Plus 3.25% Due November 2022 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 35,800
Carrying Amount		$ 35,500
Unleveraged Effective Yield		5.50%
Senior Mortgage Loans | KANSAS | LIBOR Plus 3.25% Due November 2022 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.25%
Senior Mortgage Loans | MICHIGAN | LIBOR Plus 4.40%, Due July 2020 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 35,200
Carrying Amount		$ 35,200
Unleveraged Effective Yield		6.20%
Senior Mortgage Loans | MICHIGAN | LIBOR Plus 4.40%, Due July 2020 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.40%
Senior Mortgage Loans | MINNESOTA | LIBOR Plus 3.55%, Due August 2021 | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 31,500
Carrying Amount		$ 31,300
Unleveraged Effective Yield		6.00%
Senior Mortgage Loans | MINNESOTA | LIBOR Plus 3.55%, Due August 2021 | LIBOR | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.55%
Senior Mortgage Loans | NEW YORK | Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal				$ 38,600
Senior Mortgage Loans | NEW YORK | LIBOR Plus 3.20%, Due December 2020 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 30,200
Carrying Amount		$ 30,100
Unleveraged Effective Yield		5.30%
Senior Mortgage Loans | NEW YORK | LIBOR Plus 3.20%, Due December 2020 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.20%
Senior Mortgage Loans | PENNSYLVANIA | LIBOR Plus 3.00%, Due December 2021 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 29,300
Carrying Amount		$ 29,200
Unleveraged Effective Yield		5.90%
Senior Mortgage Loans | PENNSYLVANIA | LIBOR Plus 3.00%, Due December 2021 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		3.00%
Senior Mortgage Loans | ALABAMA | LIBOR Plus 4.45% Due February 2020 | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 24,100
Carrying Amount		$ 24,100
Unleveraged Effective Yield		6.80%
Senior Mortgage Loans | ALABAMA | LIBOR Plus 4.45% Due February 2020 | LIBOR | Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		4.45%
Senior Mortgage Loans | SOUTH CAROLINA | LIBOR Plus 6. 50% Due September 2022 | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 2,000
Carrying Amount		$ 1,700
Unleveraged Effective Yield		10.10%
Senior Mortgage Loans | SOUTH CAROLINA | LIBOR Plus 6. 50% Due September 2022 | LIBOR | Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		6.50%
Subordinated debt and preferred equity investments | ILLINOIS | LIBOR Plus 12.25%, Due November 2021 | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 14,500
Carrying Amount		$ 14,300
Unleveraged Effective Yield		14.90%
Subordinated debt and preferred equity investments | ILLINOIS | LIBOR Plus 12.25%, Due November 2021 | LIBOR | Mixed-use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		12.25%
Subordinated debt and preferred equity investments | CALIFORNIA | LIBOR Plus 8.25%, Due November 2021 | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 2,800
Carrying Amount		$ 2,800
Unleveraged Effective Yield		10.20%
Subordinated debt and preferred equity investments | CALIFORNIA | LIBOR Plus 8.25%, Due November 2021 | LIBOR | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		8.25%
Subordinated debt and preferred equity investments | NEW YORK | LIBOR | Residential
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 2,100
Fixed interest rate	20.00%
Subordinated debt and preferred equity investments | NEW YORK | LIBOR Plus 14.00%, Due May 2021 | Residential Condominium
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		14,900
Carrying Amount		$ 14,800
Unleveraged Effective Yield		19.10%
Subordinated debt and preferred equity investments | NEW YORK | LIBOR Plus 14.00%, Due May 2021 | LIBOR | Residential Condominium
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Basis spread on variable rate		14.00%
Subordinated debt and preferred equity investments | NEW JERSEY | Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 17,000
Carrying Amount		$ 16,400
Fixed interest rate		12.00%
Unleveraged Effective Yield		12.80%
Subordinated debt and preferred equity investments | HAWAII | Residential Condominium
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding principal		$ 11,500
Carrying Amount		$ 11,500
Fixed interest rate		14.00%
Unleveraged Effective Yield		14.50%