Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share Reconciliation [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

Earnings per share for three months ended March 31, 2012 and 2011 are calculated as follows:

	Three Months Ended
	March 31,
	2012		2011
Numerator:
Net income	$	4,699	$	48,113
Denominator:
Shares used in computing basic earnings per share	42,758		42,133
Dilutive common stock equivalents	142		474
Shares used in computing diluted earnings per share	42,900		42,607
Basic earnings per share	$	0.11	$	1.14
Diluted earnings per share	$	0.11	$	1.13