The following table sets forth the computation of basic and diluted earnings per share for the periods indicated (in thousands, except per share data):


	Three months ended March 31,
	2013			2012
Basic and Diluted:
Net income attributable to UHS	$	119,784		$	128,607
Less: Net income attributable to unvested restricted share grants		(69	)		(168	)

Net income attributable to UHS – basic and diluted	$	119,715		$	128,439

Weighted average number of common shares—basic		97,711			96,593
Net effect of dilutive stock options and grants based on the treasury stock method		860			1,198

Weighted average number of common shares and equivalents—diluted		98,571			97,791

Earnings per basic share attributable to UHS:	$	1.23		$	1.33

Earnings per diluted share attributable to UHS:	$	1.21		$	1.31