Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Details 2)

v3.10.0.1
STOCKHOLDERS' EQUITY (Details 2) - Restricted Stock Units (RSUs) [Member]
9 Months Ended
Sep. 30, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Unvested Restricted Stock, Beginning Balance (in shares) | shares 2,017,000
Forfeited (in shares) | shares (19,000)
Vested (in shares) | shares (603,000)
Granted (in shares) | shares 428,000
Unvested Restricted Stock, Ending Balance (in shares) | shares 1,823,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Unvested Restricted Stock, Beginning Balance (in dollars per share) | $ / shares $ 24.49
Forfeited (in dollars per share) | $ / shares 26.83
Vested (in dollars per share) | $ / shares 19.40
Granted (in dollars per share) | $ / shares 48.36
Unvested Restricted Stock, Ending Balance (in dollars per share) | $ / shares $ 31.63