SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplement Disclosures Related to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Total interest costs incurred	$ 13,489	$ 14,128
Interest capitalized	543	2,333
Interest expense	12,946	11,795
Cash paid for interest, net of amounts capitalized	11,906	10,459
Cash paid for income taxes	75	50
Accounts payable and accrued liabilities for construction in progress	171	205
Accrued leasing commissions	$ 251	$ (166)