COMMITMENTS AND CONTINGENCIES (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) housing_unit condominium_tower	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 14, 2018 individual_or_entity
Commitments
Number of individuals or entities on petition | individual_or_entity				500
Loss contingency, loss in period		$ 13,400,000
Letters of credit outstanding	$ 15,400,000	15,300,000
Amount of outstanding surety bonds	200,100,000	101,200,000
Contractual rental expense, including participation rent	$ 8,500,000	$ 9,700,000	$ 8,600,000
Product liability contingency, third party recovery, percentage	20.00%
Number of open condominium towers | condominium_tower	4
Number of reserved housing units | housing_unit	375
Guarantee Obligations | Downtown columbia
Commitments
Guarantee amount	$ 1,000,000.0