EMPLOYEE SHARE PURCHASE AND DEFERRED SHARE PLAN (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee share purchase discount rate (in percent)	15.00%
Employee share purchase maximum purchase amount	$ 25,000
Employee share purchase compensation expense	10,000	10,000	10,000
Trustee [Member] | Deferred Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement compensation expense	$ 90,000	$ 70,000	$ 60,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee share purchase (in shares)	4,668	3,678	3,829