LONG TERM INCENTIVE PLAN & STOCK OPTIONS (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares)	5,989,200
REMAINING CONTRACTUAL LIFE	5 years 4 months 24 days
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 5.95
Intrinsic Value (in dollars)	$ 12,559,074
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares)	4,410,200
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 4.93
Intrinsic Value (in dollars)	$ 13,758,011
$ 1.81 to $ 2.79
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 1.81
Exercise price, high end of range (in dollars per share)	$ 2.79
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares)	952,200
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 2.30
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares)	952,200
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 2.30
$ 1.81 to $ 2.79 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	7 months 6 days
$ 1.81 to $ 2.79 | Maximum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	2 years 7 months 6 days
$ 3.06 to $4.55
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 3.06
Exercise price, high end of range (in dollars per share)	$ 4.55
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares)	1,385,000
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 3.97
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares)	1,385,000
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 3.97
$ 3.06 to $4.55 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	9 months 18 days
$ 3.06 to $4.55 | Maximum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	5 years 10 months 24 days
$ 4.93 to $6.74
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 4.93
Exercise price, high end of range (in dollars per share)	$ 6.74
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares)	1,705,000
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 6.41
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares)	1,573,334
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 6.45
$ 4.93 to $6.74 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	4 years 9 months 18 days
$ 4.93 to $6.74 | Maximum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	9 years 10 months 24 days
$ 7.13 to $10.20
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 7.13
Exercise price, high end of range (in dollars per share)	$ 10.20
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares)	1,947,000
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 8.75
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares)	499,666
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 7.81
$ 7.13 to $10.20 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	6 years 9 months 18 days
$ 7.13 to $10.20 | Maximum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	9 years 7 months 6 days