Earnings Per Share (tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

EPS Calculation Table Text Block

	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