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CALCULATION OF EARNINGS PER COMMON SHARE
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
CALCULATION OF EARNINGS PER COMMON SHARE
 CALCULATION OF EARNINGS PER COMMON SHARE

The following tables show the calculation of earnings per common share (in thousands, except per share data):
 
Years Ended December 31
 
2018
 
2017
 
2016
Net income
$
136,515

 
$
60,776

 
$
85,385

Weighted average number of common shares outstanding
 
 
 
 
 
Basic
32,784,724

 
32,888,007

 
33,820,148

Diluted
32,894,425

 
32,986,707

 
33,853,511

Earnings per common share
 
 
 
 
 
Basic
$
4.16

 
$
1.85

 
$
2.52

Diluted
$
4.15

 
$
1.84

 
$
2.52



At December 31, 2018, 2017 and 2016 there were 315,301, 302,077, and 290,719, respectively, of issued but unvested restricted stock shares and units that were included in the computation of diluted earnings per share.

At December 31, 2016 there were options to purchase an additional 5,000 shares of common stock that were not included in the computation of diluted earnings per share because their exercise price resulted in them being anti-dilutive. At December 31, 2017 and 2016 there was a warrant to purchase up to 243,998 shares of common stock and these shares were not included in the computation of diluted earnings per share because their exercise price resulted in them being anti-dilutive.