SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Share Based Compensation (Details) - Restricted Stock |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Directors | |
| Stock-Based Compensation | |
| Award vesting period | 3 years |
| Employees | |
| Stock-Based Compensation | |
| Award vesting period | 4 years |