SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details)	12 Months Ended
	Dec. 31, 2019
ACRC Lender UTRS LLC
Income Tax [Line Items]
Excise tax rate	100.00%
Percentage of ownership in subsidiaries	100.00%
ACRC Lender WTRS LLC | ACRE Capital
Income Tax [Line Items]
Excise tax rate	100.00%
Percentage of ownership in subsidiaries	100.00%