Earnings per Share

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings per Share

The dilutive effect of all outstanding stock options and unvested restricted stock units and performance share awards is included in the diluted earnings per share calculations using the treasury stock method. In addition, contingently issuable restricted stock units or performance share awards for which all necessary conditions had not been met have been excluded from the calculation. Diluted earnings per share applicable to common shareholders excludes vested options for the purchase of common stock that have grant prices in excess of the average market price, or which are otherwise anti-dilutive. For the three months ended March 31, 2012 and 2011, respectively, less than 0.1 million shares were excluded from the calculation of diluted earnings per share applicable to common shareholder calculations, as these shares relate to anti-dilutive stock options and restricted stock-based awards as calculated using the treasury stock method and could be dilutive in the future.

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