The following table presents the calculation of basic and diluted earnings per common share from continuing operations:



	Years ended December 31,
	2012			2011		2010
	(In thousands, except per share amounts)
Earnings per share — Basic:
Earnings from continuing operations	$	200,899		171,368		124,608
Less: Distributed and undistributed earnings allocated to nonvested stock	(2,566		)	(2,751	)	(1,759	)
Earnings from continuing operations available to common shareholders — Basic	$	198,333		168,617		122,849

Weighted average common shares outstanding— Basic	50,449			50,500		51,717

Earnings from continuing operations per common share — Basic	$	3.93		3.34		2.38

Earnings per share — Diluted:
Earnings from continuing operations	$	200,899		171,368		124,608
Less: Distributed and undistributed earnings allocated to nonvested stock	(2,556		)	(2,737	)	(1,756	)
Earnings from continuing operations available to common shareholders — Diluted	$	198,343		168,631		122,852

Weighted average common shares outstanding— Basic	50,449			50,500		51,717
Effect of dilutive equity awards	291			378		167
Weighted average common shares outstanding— Diluted	50,740			50,878		51,884

Earnings from continuing operations per common share — Diluted	$	3.91		3.31		2.37
Anti-dilutive equity awards and market-based restrictive stocks rights not included above	2,278			1,514		1,654