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Summarized Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2018
Summarized Quarterly Financial Data (Unaudited) [Abstract]  
Schedule of quarterly financial information

Quarterly financial information for 2017 and 2018 is as follows (in thousands except per share data):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quarter

 

2017

    

First

    

Second

    

Third

    

Fourth

 

Revenues

 

$

114,912

 

$

112,720

 

$

108,512

 

$

118,707

 

Income from operations

 

 

18,443

 

 

13,854

 

 

8,224

 

 

11,688

 

Net income (loss) 

 

 

10,578

 

 

10,302

 

 

6,227

 

 

(6,495)

 

Net income (loss) per share:

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic

 

$

1.00

 

$

0.96

 

$

0.58

 

$

(0.61)

 

Diluted

 

$

0.95

 

$

0.92

 

$

0.56

 

$

(0.61)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quarter

 

2018

    

First

    

Second

    

Third

    

Fourth

 

Revenues

 

$

116,469

 

$

114,668

 

$

160,945

 

$

242,103

 

Income (loss) from operations

 

 

11,328

 

 

4,184

 

 

(57,127)

 

 

18,875

 

Net income (loss) 

 

 

9,467

 

 

5,188

 

 

(52,781)

 

 

22,455

 

Net income (loss) per share:

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic

 

$

0.88

 

$

0.48

 

$

(2.97)

 

$

1.05

 

Diluted

 

$

0.84

 

$

0.46

 

$

(2.97)

 

$

1.02