Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Share-based Compensation [Abstract]

Schedule of Earnings Per Share Reconciliation

	Quarter ended
	March 31, 2012		March 31, 2011
BASIC EPS:
Net income	$	30,344	$	27,560
Net income available to common shareholders	$	30,344	$	27,560
Average common shares outstanding	109,211		108,769
Basic net income per share	$	0.28	$	0.25
DILUTED EPS:
Income used in diluted earnings per share calculation	$	30,344	$	27,560
Average common shares outstanding	109,211		108,769
Add: common stock equivalents
Stock option plans	—		1
Average common and common stock equivalent shares outstanding	109,211		108,770
Diluted net income per share	$	0.28	$	0.25