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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Reconciliation of Basic and Diluted Earnings per Share Computations

The following is a reconciliation of the basic and diluted EPS computations for the years ended December 31, 2015, 2014 and 2013:

 

 

 

Years Ended December 31,

 

amounts in thousands, except share and per share amounts

 

2015

 

 

2014

 

 

2013

 

Net income

 

$

81,057

 

 

$

95,329

 

 

$

63,466

 

Basic weighted average shares

 

 

14,392,522

 

 

 

14,259,768

 

 

 

14,133,925

 

Effect of common stock equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

Assumed exercise of stock options and vesting

   of stock grants

 

 

433,223

 

 

 

386,601

 

 

 

211,628

 

Diluted weighted average shares

 

 

14,825,745

 

 

 

14,646,369

 

 

 

14,345,553

 

Net income per common share:

 

 

 

 

 

 

 

 

 

 

 

 

Basic

 

$

5.63

 

 

$

6.69

 

 

$

4.49

 

Diluted

 

$

5.47

 

 

$

6.51

 

 

$

4.42