Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Basic and Diluted Earnings Per Share Under Guidance of ASC 260

The following table illustrates basic and diluted EPS under the guidance of ASC 260:

	December 31, 2012					December 31, 2011					December 31, 2010
(in thousands, except per share data)	Common Stock			Participating Securities		Common Stock			Participating Securities		Common Stock			Participating Securities
Basic EPS:
Net income	$	244,280					220,559					193,947
Less income allocated to nonvested awards		(800	)		800		(805	)		805		(959	)		959
Net income allocated to common stock for EPS calculation(a)	$	243,480			800		219,754			805		192,988			959
Average common shares outstanding(b)		187,403			627		191,239			707		195,378			975
Basic EPS(a)/(b)	$	1.30			1.28		1.15			1.14		0.99			0.98
Diluted EPS:
Net income	$	244,280					220,559					193,947
Less income allocated to nonvested awards		(796	)		796		(804	)		804		(959	)		959
Net income allocated to common stock for EPS calculation(c)	$	243,484			796		219,755			804		192,988			959
Average common shares outstanding		187,403			627		191,239			707		195,378			975
Increase due to assumed issuance of shares related to common equivalent shares outstanding		1,262					345					193
Average common and common equivalent shares outstanding(d)		188,665			627		191,584			707		195,571			975
Diluted EPS(c)/(d)	$	1.29			1.27		1.15			1.14		0.99			0.98