Income Per Share of Common Stock (Tables)

6 Months Ended

Jun. 30, 2012

Income Per Share of Common Stock

Schedule of computation of basic and diluted income per common share

	Three Months Ended June 30,			Six Months Ended June 30,
	2012		2011	2012		2011
Numerator:
Income for basic and diluted income per common share	$	4,060	5,795	$	8,684	10,609
Denominator:
Weighted-average shares for basic income per share	5,550		6,417	5,861		6,415
Effect of dilutive securities:
Employee and director stock options (1)	9		16	12		17
Adjusted weighted-average shares and assumed exercises for diluted income per share	5,559		6,433	5,873		6,432
Income per share of common stock:
Basic	$	0.73	0.90	$	1.48	1.65
Diluted	$	0.73	0.90	$	1.48	1.65

(1)  Options to acquire 10.0 shares of common stock were excluded from the calculation of dilutive securities for the 2012 and 2011 periods, as they were anti-dilutive because the exercise price exceeded the average per share market price for the periods presented.