SHARE BASED COMPENSATION, Stock options grant outstanding and excercisable (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Stock option grants outstanding and exercisable [Line Items]
Stock Options Outstanding (in shares)	158,409
Options Outstanding, Weighted Average Exercise Price per Share (in dollars per share)	$ 12.32
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 6 months
Stock Options Exercisable (in shares)	130,575
Options Exercisable, Weighted Average Exercise Price per Share (in dollars per share)	$ 14.41
Exercise Price Range 1 [Member]
Stock option grants outstanding and exercisable [Line Items]
Stock Options Outstanding (in shares)	118,671
Options Outstanding, Weighted Average Exercise Price per Share (in dollars per share)	$ 5.37
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 8 months 12 days
Stock Options Exercisable (in shares)	90,837
Options Exercisable, Weighted Average Exercise Price per Share (in dollars per share)	$ 6.24
Exercise Price Range 2 [Member]
Stock option grants outstanding and exercisable [Line Items]
Stock Options Outstanding (in shares)	19,335
Options Outstanding, Weighted Average Exercise Price per Share (in dollars per share)	$ 23.80
Options Outstanding, Weighted Average Remaining Contractual Life in Years	4 years 8 months 12 days
Stock Options Exercisable (in shares)	19,335
Options Exercisable, Weighted Average Exercise Price per Share (in dollars per share)	$ 23.80
Exercise Price Range 3 [Member]
Stock option grants outstanding and exercisable [Line Items]
Stock Options Outstanding (in shares)	16,069
Options Outstanding, Weighted Average Exercise Price per Share (in dollars per share)	$ 34.52
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 1 month 6 days
Stock Options Exercisable (in shares)	16,069
Options Exercisable, Weighted Average Exercise Price per Share (in dollars per share)	$ 34.52
Exercise Price Range 4 [Member]
Stock option grants outstanding and exercisable [Line Items]
Stock Options Outstanding (in shares)	4,334
Options Outstanding, Weighted Average Exercise Price per Share (in dollars per share)	$ 69.22
Options Outstanding, Weighted Average Remaining Contractual Life in Years	4 years 3 months 18 days
Stock Options Exercisable (in shares)	4,334
Options Exercisable, Weighted Average Exercise Price per Share (in dollars per share)	$ 69.22