Net income per common share is calculated as basic net income per share and diluted net income per share. Basic net income per share excludes dilution and is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding for the period. Diluted net income per share is computed in the same manner as basic net income after assuming issuance of common stock for all potentially dilutive equivalent shares, which includes the potential dilution that could occur: (1) if all the Company's outstanding stock options that are in-the-money were exercised (using the treasury stock method); (2) if the RSUs with service conditions were fully vested (using the treasury stock method); and (3) if the RSUs with service and market conditions were considered contingently issuable.

For the periods indicated, the following tables present the computations of basic and diluted net income per share:

	Six Months Ended
	June 30, 2011					June 30, 2010
	(amounts in thousands, except share and per share data)
				Net Income					Net Income
	Net Income		Shares	Per Share		Net Income		Shares	Per Share
Basic net income per common share:
Net income	$	49,755	36,337,899	$	1.37	$	18,462	35,686,383	$	0.52
Impact of equity awards			1,616,697					1,991,806
Diluted net income per common share:
Net income	$	49,755	37,954,596	$	1.31	$	18,462	37,678,189	$	0.49

	Three Months Ended
	June 30, 2011					June 30, 2010
	(amounts in thousands, except share and per share data)
				Net Income					Net Income
	Net Income		Shares	Per Share		Net Income		Shares	Per Share
Basic net income per common share:
Net income	$	48,734	36,352,750	$	1.34	$	14,262	35,714,159	$	0.40
Impact of equity awards			1,388,839					1,867,765
Diluted net income per common share:
Net income	$	48,734	37,741,589	$	1.29	$	14,262	37,581,924	$	0.38

For the periods indicated, the following table provides the incremental shares excluded as they were anti-dilutive under the treasury stock method:

		Six Months Ended
		June 30,
Impact Of Equity Awards		2011		2010
		(amounts in thousands,
		except per share amounts)

Dilutive or anti-dilutive for all potentially dilutive equivalent shares:		dilutive		dilutive
Excluded shares as anti-dilutive under the
treasury stock method:
	Options		54		66
	Price range of options: from	$	10.22	$	11.01
	Price range of options: to	$	48.21	$	48.21
	RSUs with service conditions		672		109
	RSUs with service and market conditions		200		-
	Total RSUs		872		109

		Three Months Ended
		June 30,
Impact Of Equity Awards		2011		2010
		(amounts in thousands,
		except per share data)

Dilutive or anti-dilutive for all potentially dilutive equivalent shares:		dilutive		dilutive
Excluded shares as anti-dilutive under the treasury stock method:
	Options		54		33
	Price range of options: from	$	9.39	$	12.50
	Price range of options: to	$	48.21	$	48.21
	RSUs with service conditions		1,053		91
	RSUs with service and market conditions		200		-
	Total RSUs		1,253		91