Earnings Per Share

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share

11. Earnings per Share

The Company has non-vested shares of restricted stock that are considered participating securities and computes basic and diluted earnings per share under the two-class method. Basic earnings per share for the periods are based upon the weighted average number of shares of common stock outstanding during the periods. Diluted earnings per share include the effect of certain stock options.

		00,000			00,000			00,000			00,000
	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Net income	$	67,930		$	62,731		$	232,523		$	137,320
Less:
Net income attributable to participating securities		(598	)		(639	)		(2,087	)		(1,385	)
Net income attributable to common shareholders	$	67,332		$	62,092		$	230,436		$	135,935

The following table reconciles the denominator for the basic and diluted earnings per share computations shown in the consolidated statements of operations:

		00,000		00,000		00,000		00,000
	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Weighted average common shares—basic		66,012,102		65,481,175		65,919,892		65,444,851
Plus incremental shares from:
Assumed exercise of options		369,830		196,814		387,712		158,238
Weighted average common shares—diluted		66,381,932		65,677,989		66,307,604		65,603,089
Earnings per share:
Basic	$	1.02	$	0.95	$	3.50	$	2.08
Diluted	$	1.01	$	0.95	$	3.48	$	2.07

Excluded from the computation of diluted earnings per share are options to purchase 99,592 and 698,340 shares of common stock for the three months ended September 30, 2011 and 2010, respectively, and 151,923 and 699,710 shares of common stock for the nine months ended September 30, 2011 and 2010, respectively. These options were outstanding during the periods reported but were excluded because the effect of including them would have been antidilutive.