Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Earnings Per Share (Details)

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Stockholders' Equity and Earnings Per Share (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Diluted shares      
Basic weighted average common stock issued and outstanding 57,673,342 57,047,531 56,465,800
Dilutive options 1,158,717 925,050 572,253
Total diluted shares 58,832,059 57,972,581 57,038,053