Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share (Tables) [Abstract]

Earnings Per Share

	Three Months Ended September 30, 2012
	Net Earnings		Weighted Average Shares	Per Share
Basic earnings per common share	$	39,910	58,882	$	0.68
Effect of dilutive stock awards	—		430
Diluted earnings per common share	$	39,910	59,312	$	0.67

	Three Months Ended September 30, 2011
	Net Earnings		Weighted Average Shares	Per Share
Basic earnings per common share	$	31,224	60,030	$	0.52
Effect of dilutive stock awards	—		474
Diluted earnings per common share	$	31,224	60,504	$	0.52

	Nine Months Ended September 30, 2012
	Net Earnings		Weighted Average Shares	Per Share
Basic earnings per common share	$	136,033	59,098	$	2.30
Effect of dilutive stock awards	—		511
Diluted earnings per common share	$	136,033	59,609	$	2.28

	Nine Months Ended September 30, 2011
	Net Earnings		Weighted Average Shares	Per Share
Basic earnings per common share	$	115,342	61,944	$	1.86
Effect of dilutive stock awards	—		704
Diluted earnings per common share	$	115,342	62,648	$	1.84