BASIC AND DILUTED NET EARNINGS PER SHARE (Details) - shares |
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Dec. 31, 2014 |
|
| BASIC AND DILUTED NET EARNINGS PER SHARE [Abstract] | |||
| Options to purchase Class A common stock | 1,628,534 | 1,887,329 | 1,816,204 |
| Dilutive shares | 447,689 | 729,560 | |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|