TAXABLE INCOME AND TAX BASIS (Details)	12 Months Ended
	Dec. 31, 2014 USD ($)
TAXABLE INCOME AND TAX BASIS
Excess amount of statement income over taxable income	$ 3,100,000
Excess amount of cumulative statement basis over cumulative taxable basis	5,000,000
Excess amount of statement income from joint venture investments over taxable income	1,300,000
Reconciliation of GAAP net income to taxable income
Taxable loss	$ 2,100,000