STOCK-BASED COMPENSATION (Details 2) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Summary of stock option activity
Outstanding at beginning of period (in shares)			677,708
Exercised (in shares)			(82,732)
Expired (in shares)			(169,977)
Outstanding at end of period (in shares)	424,999		424,999
Vested or expected to vest at end of period (in shares)	424,999		424,999
Exercisable at end of period (in shares)	424,999		424,999
Outstanding at beginning of period, weighted average exercise price (in dollars per share)			$ 28.41
Exercised, weighted average exercise price (in dollars per share)			$ 18.06
Expired, weighted average exercise price (in dollars per share)			$ 37.32
Outstanding at end of period, weighted average exercise price (in dollars per share)	$ 26.86		$ 26.86
Vested or expected to vest at end of period, weighted average exercise price (in dollars per share)	$ 26.86		$ 26.86
Exercisable at end of period, weighted average exercise price (in dollars per share)	$ 26.86		$ 26.86
Outstanding at end of period, weighted average remaining term			1 year 22 days
Vested or expected to vest at end of period, weighted average remaining term			1 year 22 days
Exercisable at end of period, weighted average remaining term			1 year 22 days
Outstanding at end of period, aggregate intrinsic value	$ 3,110		$ 3,110
Vested or expected to vest at end of period, aggregate intrinsic value	3,110		3,110
Exercisable at end of period, aggregate intrinsic value	3,110		3,110
Summary of unvested stock option activity
Unvested options at beginning of period (in shares)			14,502
Vested (in shares)			(14,502)
Unvested options at beginning of period, weighted average grant date fair value (in dollars per share)			$ 3.00
Vested, weighted average grant date fair value (in dollars per share)			$ 3.00
Share based compensation plan, additional disclosures
Total intrinsic value of options exercised	388	123	812		978
Total fair value of options vested			$ 363	[1]	$ 3,672	[1]
Minimum
Stock Options
Vesting period			3 years
Contractual term of stock option grants			7 years
Maximum
Stock Options
Vesting period			4 years
Contractual term of stock option grants			10 years

[1] Stock options were fully vested during the first quarter of 2013.