FAIR VALUE (Non-financial Assets Measured at Fair Value on a Non-recurring Basis) (Details) - Fair Value, Nonrecurring $ in Thousands	Dec. 31, 2020 USD ($)	Mar. 31, 2020
Measurement Input, Cap Rate | Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input	0.100	0.10
Outlet Collection at Riverwalk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	$ 46,794
Outlet Collection at Riverwalk | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	0
Outlet Collection at Riverwalk | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	0
Outlet Collection at Riverwalk | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	$ 46,794