Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Weighted Average Common Shares Outstanding

A reconciliation of the weighted average common shares outstanding used in the basic and diluted earnings per weighted average common share (EPS) calculation was as follows (in thousands):

	2012	2011	2010
Weighted average common shares outstanding:
Basic EPS calculation	110,753	110,626	110,442
Effect of dilutive share-based awards	15	52	79
Diluted EPS calculation	110,768	110,678	110,521