Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2012

Basic And Diluted Earnings Per Common Share

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Distributed earnings allocated to common stock	$	29,430	$	28,123	$	87,005	$	83,695
Undistributed earnings allocated to common stock		29,051		26,238		90,195		77,868
Net earnings allocated to common stock	$	58,481	$	54,361	$	177,200	$	161,563
Weighted-average shares outstanding for basic earnings per common share		61,316,854		61,137,054		61,269,850		61,083,390
Dilutive effect of stock compensation		369,596		102,092		347,204		199,013
Weighted-average shares outstanding for diluted earnings per common share		61,686,450		61,239,146		61,617,054		61,282,403