STOCK-BASED COMPENSATION (Details 4) (Stock options, USD $)	9 Months Ended
	Sep. 30, 2013
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	1,043,737
Options Outstanding - Weighted Average Remaining Contractual Term	5 years
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 8.99
Options Exercisable at the end of the period (in shares)	892,445
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 9.35
Range of exercise price $0.01 to $4.99
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	173
Options Outstanding - Weighted Average Remaining Contractual Term	5 months 12 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 2.49
Options Exercisable at the end of the period (in shares)	173
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 2.49
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
Range of exercise price $5.00 to $7.45
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	304,327
Options Outstanding - Weighted Average Remaining Contractual Term	7 years 11 months 16 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 6.65
Options Exercisable at the end of the period (in shares)	153,035
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 6.39
Exercise price, low end of the range (in dollars per share)	$ 5
Exercise price, high end of the range (in dollars per share)	$ 7.45
Range of exercise price $7.46 to $9.99
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	602,418
Options Outstanding - Weighted Average Remaining Contractual Term	4 years 3 months 7 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 8.46
Options Exercisable at the end of the period (in shares)	602,418
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 8.46
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
Range of exercise price $10.00 to $14.99
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	10,029
Options Outstanding - Weighted Average Remaining Contractual Term	1 year
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 12.27
Options Exercisable at the end of the period (in shares)	10,029
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 12.27
Exercise price, low end of the range (in dollars per share)	$ 10
Exercise price, high end of the range (in dollars per share)	$ 14.99
Range of exercise price $15.00 to $19.99
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	80,127
Options Outstanding - Weighted Average Remaining Contractual Term	1 year 8 months 5 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 15.00
Options Exercisable at the end of the period (in shares)	80,127
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 15.00
Exercise price, low end of the range (in dollars per share)	$ 15
Exercise price, high end of the range (in dollars per share)	$ 19.99
Range of exercise price $20.00 to $20.19
Stock options outstanding and exercisable by range of exercise prices
Options Outstanding at the end of the period (in shares)	46,663
Options Outstanding - Weighted Average Remaining Contractual Term	1 year 8 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
Exercise price, low end of the range (in dollars per share)	$ 20
Exercise price, high end of the range (in dollars per share)	$ 20.19