Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Calculation of Basic and Diluted Weighted Average Shares Outstanding Earnings Per Share

The following table sets forth the calculation of basic and diluted weighted average shares outstanding and earnings per share for the indicated periods.

	Three Months Ended March 31,
	2013			2012
	(in thousands, except per share data)
Income (numerator):
Basic:
Net income	$	40,758		$	50,974
Net income attributable to participating securities		(770	)		(877	)
Net income attributable to common stock—basic	$	39,988		$	50,097
Diluted:
Net income	$	40,758		$	50,974
Net income attributable to participating securities		(770	)		(876	)
Net income attributable to common stock—diluted	$	39,988		$	50,098
Weighted average shares (denominator):
Weighted average shares—basic		48,619			48,254
Diluted effect of stock options		38			45
Weighted average shares—diluted		48,657			48,299
Basic income per common share	$	0.82		$	1.04
Diluted income per common share	$	0.82		$	1.04