Earnings Per Share (tables)

12 Months Ended

Dec. 31, 2011

Earnings per share of common stock [Abstract]

EPS Calculation Table Text Block

Thousands, except per share amounts			2011		2010		2009
Net income		$	63,898	$	72,667	$	75,122
Average common shares outstanding - basic			26,687		26,589		26,511
	Additional shares for stock-based compensation plans		57		68		65
Average common shares outstanding - diluted			26,744		26,657		26,576
Earnings per share of common stock - basic		$	2.39	$	2.73	$	2.83
Earnings per share of common stock - diluted		$	2.39	$	2.73	$	2.83
Additional information:
	Antidilutive shares not included in net income per diluted
	common share calculation		2,101		743		2,142