STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013
Options outstanding
Number (in shares)	2,589,343
Options exercisable
Number (in shares)	2,194,755
$0.00 - $10.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 0.00
Exercise price, high end of range (in dollars per share)	$ 10.00
Options outstanding
Number (in shares)	1,700,112
Weighted average remaining contractual life	4 years 5 months 26 days
Weighted average exercise price (in dollars per share)	$ 9.14
Options exercisable
Number (in shares)	1,700,112
Weighted average remaining contractual life	4 years 5 months 26 days
Weighted average exercise price (in dollars per share)	$ 9.14
$10.01 - $20.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 10.01
Exercise price, high end of range (in dollars per share)	$ 20.00
Options outstanding
Number (in shares)	97,737
Weighted average remaining contractual life	2 years 9 months 18 days
Weighted average exercise price (in dollars per share)	$ 12.45
Options exercisable
Number (in shares)	97,737
Weighted average remaining contractual life	2 years 9 months 18 days
Weighted average exercise price (in dollars per share)	$ 12.45
$20.01 - $30.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 20.01
Exercise price, high end of range (in dollars per share)	$ 30.00
Options outstanding
Number (in shares)	502,686
Weighted average remaining contractual life	6 years 3 months 18 days
Weighted average exercise price (in dollars per share)	$ 23.07
Options exercisable
Number (in shares)	328,625
Weighted average remaining contractual life	6 years 3 months 22 days
Weighted average exercise price (in dollars per share)	$ 23.15
$30.01 - $40.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 30.01
Exercise price, high end of range (in dollars per share)	$ 40.00
Options outstanding
Number (in shares)	61,058
Weighted average remaining contractual life	6 years 11 months 23 days
Weighted average exercise price (in dollars per share)	$ 33.54
Options exercisable
Number (in shares)	23,874
Weighted average remaining contractual life	7 years 3 months 18 days
Weighted average exercise price (in dollars per share)	$ 33.44
$50.01 - $60.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 50.01
Exercise price, high end of range (in dollars per share)	$ 60.00
Options outstanding
Number (in shares)	10,000
Weighted average remaining contractual life	8 years 4 months 13 days
Weighted average exercise price (in dollars per share)	$ 53.00
Options exercisable
Number (in shares)	3,750
Weighted average remaining contractual life	8 years 4 months 13 days
Weighted average exercise price (in dollars per share)	$ 53.00
$60.01 - $70.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 60.01
Exercise price, high end of range (in dollars per share)	$ 70.00
Options outstanding
Number (in shares)	142,750
Weighted average remaining contractual life	8 years 2 months 8 days
Weighted average exercise price (in dollars per share)	$ 60.67
Options exercisable
Number (in shares)	40,657
Weighted average remaining contractual life	8 years 2 months 8 days
Weighted average exercise price (in dollars per share)	$ 60.67
$80.01 - $90.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 80.01
Exercise price, high end of range (in dollars per share)	$ 90.00
Options outstanding
Number (in shares)	15,000
Weighted average remaining contractual life	9 years 1 month 13 days
Weighted average exercise price (in dollars per share)	$ 83.86
$90.01 - $100.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 90.01
Exercise price, high end of range (in dollars per share)	$ 100.00
Options outstanding
Number (in shares)	30,000
Weighted average remaining contractual life	9 years 2 months 16 days
Weighted average exercise price (in dollars per share)	$ 94.19
$120.01 - $130.00
Stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 120.01
Exercise price, high end of range (in dollars per share)	$ 130.00
Options outstanding
Number (in shares)	30,000
Weighted average remaining contractual life	9 years 7 months 13 days
Weighted average exercise price (in dollars per share)	$ 125.98