Earnings Per Share

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

3. EARNINGS PER SHARE

Basic earnings per share are computed using net income and the weighted-average number of common shares outstanding for each period presented. Diluted earnings per share are computed in the same manner, except it uses the weighted-average number of common shares outstanding plus the effects of the assumed exercise of stock options, and payment of estimated stock awards from other stock-based compensation plans that are outstanding at the end of each period presented. Diluted earnings per share are calculated as follows:

	Three Months Ended
	March 31,
In thousands, except per share data	2013		2012
Net income	$	37,639	$	40,284
Average common shares outstanding - basic	26,929		26,781
Additional shares for stock-based compensation plans outstanding	44		81
Average common shares outstanding - diluted	26,973		26,862
Earnings per share of common stock - basic	$	1.40	$	1.50
Earnings per share of common stock - diluted	$	1.40	$	1.50
Additional information:
Anti-dilutive shares excluded from net income per diluted common share calculation	32		1