SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2011

SHARE-BASED COMPENSATION

Assumptions used to estimate fair value of options on the date of grant

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Number of options granted	22,000			113,000			34,000			113,000
Grant date fair value of options granted per share	$	17.76		$	20.24		$	17.53		$	20.24
Weighted average exercise price of options granted	$	31.16		$	35.51		$	30.61		$	35.51
Volatility (1)	59		%	57		%	59		%	57		%
Risk free interest rate (2)	2.4		%	3.3		%	2.5		%	3.3		%
Expected term (in years) (3)	6.3			6.3			6.3			6.3
Expected annual dividends	None			None			None			None

(1)	Expected volatility is based on the historical volatility of our common stock over a preceding period commensurate with the expected term of the award.
(2)	The risk free rate for periods within the expected term of the stock option is based on the U.S. Treasury yield curve in effect at the time of grant.
(3)	The expected term was calculated as the average between the vesting term and the contractual term, weighted by tranche. We used this simplified method as we do not have sufficient historical data in order to calculate a more appropriate estimate.