Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2012

Basic And Diluted Earnings Per Common Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Distributed earnings allocated to common stock	$	29,424	$	28,102	$	57,575	$	55,572
Undistributed earnings allocated to common stock		28,453		27,378		61,144		51,630
Net earnings allocated to common stock	$	57,877	$	55,480	$	118,719	$	107,202
Weighted-average shares outstanding for basic earnings per common share		61,290,792		61,093,641		61,245,959		61,056,113
Dilutive effect of stock compensation		344,044		297,075		338,732		306,404
Weighted-average shares outstanding for diluted earnings per common share		61,634,836		61,390,716		61,584,691		61,362,517