COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
COMMITMENTS AND CONTINGENCIES
Amount of outstanding letters of credit and surety bonds	$ 58,700,000	$ 49,300,000
Contractual rental expense, including participation rent	6,300,000	5,400,000	5,200,000
Mortgages, notes and loans payable
2014	5,462,000
2015	26,958,000
2016	470,784,000
2017	25,885,000
2018	26,683,000
Subsequent/Other	958,851,000
Total	1,514,623,000
Ground lease and other leasing commitments
2014	5,152,000
2015	7,152,000
2016	8,787,000
2017	7,883,000
2018	6,744,000
Subsequent/Other	332,867,000
Total	368,585,000
Uncertainty in income taxes, including interest
Subsequent/Other	129,183,000
Total	129,183,000
Total
2014	10,614,000
2015	34,110,000
2016	479,571,000
2017	33,768,000
2018	33,427,000
Subsequent/Other	1,420,901,000
Total	2,012,391,000
Contractual obligations relating to long-term commitments
Mortgages, notes and loans payable	1,514,623,000	688,312,000
The Woodlands | Credit Facility
Contractual obligations relating to long-term commitments
Maximum Facility Amount	250,000,000
3 Waterway Square
Contractual obligations relating to long-term commitments
Mortgages, notes and loans payable	52,000,000
One Hughes Landing
Contractual obligations relating to long-term commitments
Mortgages, notes and loans payable	38,000,000
Columbia Regional Building
Contractual obligations relating to long-term commitments
Mortgages, notes and loans payable	23,000,000
Other Corporate Financing
Contractual obligations relating to long-term commitments
Mortgages, notes and loans payable	$ 21,300,000