Earnings per share

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Earnings per share

The reconciliation between basic and diluted earnings per share (“EPS”) is calculated using the treasury stock method and presented as follows:

	Three Months Ended				Six Months Ended
	June 30, 2012		June 30, 2011		June 30, 2012		June 30, 2011
BASIC EPS:
Net income	$	30,585	$	29,763	$	60,929	$	57,324
Net income available to common shareholders	$	30,585	$	29,763	$	60,929	$	57,324
Average common shares outstanding	109,562		109,138		109,386		108,954
Basic net income per share	$	0.28	$	0.27	$	0.56	$	0.53
DILUTED EPS:
Income used in diluted earnings per share calculation	$	30,585	$	29,763	$	60,929	$	57,324
Average common shares outstanding	109,562		109,138		109,386		108,954
Equivalents from stock option plans	—		1		—		1
Average common and common stock equivalent shares outstanding	109,562		109,139		109,386		108,955
Diluted net income per share	$	0.28	$	0.27	$	0.56	$	0.53

For the three months ended June 30, 2012 and 2011 options to purchase 1.8 million and 3.4 million shares, respectively, were outstanding, but not included in the computation of diluted EPS because they were antidilutive.