Earnings Per Share

6 Months Ended

Jun. 30, 2011

Earnings Per Share

2. Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share under the two-class method:

	Three months ended June 30,						Six months ended June 30,
		2011			2010			2011			2010
Numerator for basic and diluted earnings per share:
Net income	$	29,944		$	18,734		$	60,108		$	37,726
Effect of reallocating undistributed earnings of participating securities		(174	)		(117	)		(350	)		(238	)
Net income available under the two-class method	$	29,770		$	18,617		$	59,758		$	37,488
Denominator:
Denominator for basic earnings per share— weighted-average shares		23,027,104			22,971,383			23,020,851			22,969,445
Effect of dilutive securities:
Employee stock options (See Note 6)		1,346			3,527			1,324			4,614
Deferred stock awards (See Note 6)		—			4,028			—			4,023
Dilutive potential common shares		1,346			7,555			1,324			8,637
Denominator for diluted earnings per share— adjusted weighted-average shares		23,028,450			22,978,938			23,022,175			22,978,082
Basic earnings per share	$	1.29		$	0.81		$	2.60		$	1.63
Diluted earnings per share	$	1.29		$	0.81		$	2.60		$	1.63