Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The computation of basic and diluted earnings per share ("EPS") is as follows (in thousands, except per share amounts):

			Quarters Ended June 30,						Six Months Ended June 30,
Numerator			2011			2010			2011			2010
		Net income	$	21,217		$	6,345		$	33,552		$	15,613
		Percentage allocated to shareholders (1)		98.9	%		99.2	%		98.9	%		99.2	%
		Numerator for basic and diluted earnings per share	$	20,984		$	6,294		$	33,183		$	15,488
Denominator
		Denominator for basic earnings per share -
		weighted-average shares outstanding		58,422			57,682			58,361			57,373
		Dilutive effect of stock options		454			667			472			729
		Denominator for diluted earnings per share		58,876			58,349			58,833			58,102
Per share income
		Basic	$	0.36		$	0.11		$	0.57		$	0.27
		Diluted		0.36			0.11			0.56			0.27
_________________________
	(1)	Basic weighted-average shares outstanding		58,422			57,682			58,361			57,373
		Basic weighted-average shares outstanding and
		unvested restricted share units expected to vest		59,096			58,155			59,039			57,847
		Percentage allocated to shareholders		98.9	%		99.2	%		98.9	%		99.2	%