SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Developments by Category) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Developments
Land and improvements	$ 423,520	$ 456,450
Development costs	1,022,477	829,842
Condominium projects	0	3,776
Total Developments	$ 1,445,997	$ 1,290,068