STOCK-BASED COMPENSATION (Tables)
|6 Months Ended|
Jun. 30, 2015
|Disclosure of Compensation Related Costs, Share-based Payments [Abstract]|
|Fair Value of Employee Stock Options Granted and Determined by Black-Scholes Valuation Model Assumptions||
The weighted average fair value of our employee stock options granted, as determined by the Black-Scholes valuation model, was $18.07 and $20.48 for 2015 and 2014, respectively, using the following assumptions:
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
Reference 1: http://www.xbrl.org/2003/role/presentationRef