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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Summary of Purchase and Sale of Common Stock

The following table summarizes the shares of the Company’s common stock that were purchased and sold by the Company’s Rabbi Trust, which holds the investments for the Capital Accumulation Plan:

 

 

 

For The Years Ended December 31,

 

 

 

2017

 

 

2016

 

 

2015

 

Shares of common stock purchased

 

 

8,220

 

 

 

11,530

 

 

 

56,325

 

Aggregate purchase price of shares purchased

 

$

390,542

 

 

$

291,349

 

 

$

2,226,675

 

Shares of common stock sold

 

 

4,717

 

 

 

10,694

 

 

 

83,961

 

Aggregate sale price of shares sold

 

$

271,417

 

 

$

322,928

 

 

$

3,380,448