Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

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

			Quarters Ended March 31,
Numerator			2012		2011
		Net income	$	12,993	$	12,335
		Percentage allocated to shareholders (1)		99.4%		98.8%
		Numerator for basic and diluted earnings per share	$	12,915	$	12,187
Denominator
		Denominator for basic earnings per share -
		weighted-average shares outstanding		58,941		58,299
		Dilutive effect of stock options and restricted stock units		334		490
		Denominator for diluted earnings per share		59,275		58,789
Per share income
		Basic	$	0.22	$	0.21
		Diluted		0.22		0.21
_________________________
	(1)	Basic weighted-average shares outstanding		58,941		58,299
		Basic weighted-average shares outstanding and
		unvested restricted share units expected to vest		59,286		58,982
		Percentage allocated to shareholders		99.4%		98.8%