Earnings per share

9 Months Ended

Sep. 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				Nine Months Ended
	September 30, 2012		September 30, 2011		September 30, 2012		September 30, 2011
BASIC EPS:
Net income	$	34,953	$	31,737	$	95,882	$	89,060
Net income available to common shareholders	$	34,953	$	31,737	$	95,882	$	89,060
Average common shares outstanding	109,645		109,245		109,473		109,052
Basic net income per share	$	0.32	$	0.29	$	0.88	$	0.82
DILUTED EPS:
Income used in diluted earnings per share calculation	$	34,953	$	31,737	$	95,882	$	89,060
Average common and common stock equivalent shares outstanding	109,645		109,246		109,473		109,053
Diluted net income per share	$	0.32	$	0.29	$	0.88	$	0.82

For the three months ended September 30, 2012 and 2011 options to purchase 1.8 million and 3.3 million shares, respectively, were outstanding, but not included in the computation of diluted EPS because they were antidilutive.