Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Computation of basic and diluted net income per share

Basic earnings per share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Except where the result would be anti-dilutive, dilutive earnings per share is calculated by assuming the vesting of unvested restricted stock and the exercise of stock options, as well as their related income tax benefits. The following table reconciles the numerator and the denominator used to calculate basic and diluted earnings per share:

	Three months ended March 31,
	2013		2012
Numerator- net income	$	50,674	$	30,060
Denominator- weighted average shares
Basic		67,864,475		67,200,480
Dilutive effect of stock compensation awards (1)		1,690,466		1,437,447
Diluted		69,554,941		68,637,927
Net income per share
Basic	$	0.75	$	0.45
Diluted	$	0.73	$	0.44

(1) Excludes approximately 250,000 stock options and 60,000 shares of restricted stock for 2013 as the impact of such awards was anti-dilutive. Excludes approximately 350,000 stock options and 190,000 shares of restricted stock for 2012 as the impact of such awards was anti-dilutive.