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EMPLOYEE SHARE PURCHASE AND DEFERRED SHARE PLAN (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
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 | 20,000
Trustee [Member] | Deferred Compensation [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deferred compensation arrangement compensation expense | $ 60,000 | $ 60,000 | $ 60,000
Common Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Employee share purchase (in shares) | 3,829 | 4,886 | 6,184

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