LEASES - Lessee Expenses (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee operating leases
Contractual ground lease expense	$ 400
Variable lease expense	400
Operating lease right-of-use asset amortization	1,200
Operating lease liabilities amortization	800
Short-term Lease Payments	0
LAND
Lessee operating leases
Contractual ground lease expense	8,272
Variable lease expense	664
LAND | Other operating expense
Lessee operating leases
Total lease expense	8,936
Office Space
Lessee operating leases
Total lease expense	9,006
Office Space | General and administrative expense
Lessee operating leases
Contractual ground lease expense	$ 70