DEFERRED COSTS - Deferred Costs (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs [Line Items]
Leasing costs, Total Cost	$ 156,619	$ 144,831
Total Cost	162,918	151,129
Leasing costs, Accumulated Amortization	(63,257)	(56,846)
Total, Accumulated Amortization	(67,358)	(60,054)
Leasing costs, Deferred Costs, net	93,362	87,985
Financing costs, Deferred Costs, net	10,336
Deferred Costs	95,560	91,075
Revolving Credit Facility
Deferred Costs [Line Items]
Financing costs, Total Cost	6,299	6,298
Financing costs, Accumulated Amortization	(4,101)	(3,208)
Financing costs, Deferred Costs, net	$ 2,198	$ 3,090