The following table sets forth the components of basic and diluted earnings (loss) per share (in thousands): 
  
| 
   
 | 
   
 | 
 Three Months 
Ended June 30, 
 | 
   
 | 
 Nine Months 
Ended June 30, 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 2013 
 | 
   
 | 
 2012 
 | 
   
 | 
 2013 
 | 
   
 | 
 2012 
 | 
   
 | 
 
| 
 Numerator: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income from continuing operations 
 | 
   
 | 
 $ 
 | 
 28,036 
 | 
   
 | 
 $ 
 | 
 20,476 
 | 
   
 | 
 $ 
 | 
 81,533 
 | 
   
 | 
 $ 
 | 
 52,345 
 | 
   
 | 
 
| 
 Income (loss) from discontinued operations 
 | 
   
 | 
 64 
 | 
   
 | 
 9 
 | 
   
 | 
 (428 
 | 
 ) 
 | 
 117 
 | 
   
 | 
 
| 
 Net income 
 | 
   
 | 
 $ 
 | 
 28,100 
 | 
   
 | 
 $ 
 | 
 20,485 
 | 
   
 | 
 $ 
 | 
 81,105 
 | 
   
 | 
 $ 
 | 
 52,462 
 | 
   
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Denominator: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Basic weighted average shares outstanding 
 | 
   
 | 
 68,162 
 | 
   
 | 
 67,946 
 | 
   
 | 
 68,168 
 | 
   
 | 
 67,615 
 | 
   
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Effect of dilutive securities: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Employee stock options and unvested restricted stock units 
 | 
   
 | 
 1,705 
 | 
   
 | 
 1,790 
 | 
   
 | 
 1,696 
 | 
   
 | 
 1,825 
 | 
   
 | 
 
| 
 Denominator for diluted earnings (loss) per share 
 | 
   
 | 
 69,867 
 | 
   
 | 
 69,736 
 | 
   
 | 
 69,864 
 | 
   
 | 
 69,440 
 | 
 
 
 
 |