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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Computation of Basic Earnings and Diluted Earnings Per Share Data

Basic earnings and diluted earnings per share data were computed as follows:

 

 

 

Years Ended December 31,

 

 

 

2014

 

 

2013

 

 

2012

 

Numerator for basic and diluted earnings per share:

 

 

 

 

 

 

 

 

 

 

 

 

Net income

 

$

58,940

 

 

$

39,101

 

 

$

32,994

 

Denominator:

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average basic common shares outstanding

 

 

33,011

 

 

 

31,891

 

 

 

30,327

 

Assumed conversion of dilutive securities:

 

 

 

 

 

 

 

 

 

 

 

 

Stock options

 

 

2,390

 

 

 

2,699

 

 

 

2,589

 

Denominator for diluted earnings per share

   - Adjusted weighted-average shares

 

 

35,401

 

 

 

34,590

 

 

 

32,916

 

Earnings per common share:

 

 

 

 

 

 

 

 

 

 

 

 

Basic

 

$

1.79

 

 

$

1.23

 

 

$

1.09

 

Diluted

 

$

1.66

 

 

$

1.13

 

 

$

1.00