STOCK-BASED COMPENSATION (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	1,072,503
Options Outstanding - Weighted Average Remaining Contractual Term	5 years 8 months 5 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 8.97
Options Exercisable at the end of the period (in shares)	230,073
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 12.60
Range of exercise price $0.01 to $4.99
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 0.01
Exercise price, high end of the range (in dollars per share)	$ 4.99
Options Outstanding at the end of the period (in shares)	4,228
Options Outstanding - Weighted Average Remaining Contractual Term	9 months 22 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 3.27
Options Exercisable at the end of the period (in shares)	4,228
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 3.27
Range of exercise price $5.00 to $7.45
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 5.00
Exercise price, high end of the range (in dollars per share)	$ 7.45
Options Outstanding at the end of the period (in shares)	306,685
Options Outstanding - Weighted Average Remaining Contractual Term	8 years 7 months 24 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 6.65
Options Exercisable at the end of the period (in shares)	54,105
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 5.92
Range of exercise price $7.46 to $9.99
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 7.46
Exercise price, high end of the range (in dollars per share)	$ 9.99
Options Outstanding at the end of the period (in shares)	619,045
Options Outstanding - Weighted Average Remaining Contractual Term	5 years 4 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 8.44
Options Exercisable at the end of the period (in shares)	29,195
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 7.60
Range of exercise price $10.00 to $14.99
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 10.00
Exercise price, high end of the range (in dollars per share)	$ 14.99
Options Outstanding at the end of the period (in shares)	15,087
Options Outstanding - Weighted Average Remaining Contractual Term	1 year 8 months 19 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 12.40
Options Exercisable at the end of the period (in shares)	15,087
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 12.40
Range of exercise price $15.00 to $19.99
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 15.00
Exercise price, high end of the range (in dollars per share)	$ 19.99
Options Outstanding at the end of the period (in shares)	80,795
Options Outstanding - Weighted Average Remaining Contractual Term	2 years 5 months 1 day
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 15.02
Options Exercisable at the end of the period (in shares)	80,795
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 15.02
Range of exercise price $20.00 to $24.99
Stock options outstanding and exercisable by range of exercise prices
Exercise price, low end of the range (in dollars per share)	$ 20.00
Exercise price, high end of the range (in dollars per share)	$ 24.99
Options Outstanding at the end of the period (in shares)	46,663
Options Outstanding - Weighted Average Remaining Contractual Term	2 years 5 months 5 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 20.19
Options Exercisable at the end of the period (in shares)	46,663
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 20.19