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Consolidated Statements of Cash Flows Information (Tables)
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]  
Schedule of supplemental disclosures of cash flow information
Supplemental disclosures of cash flow information are as follows:
 
2017
 
2016
 
2015
Net cash paid (received) during the years for:
 
 
 
 
 
Interest
$
33,952

 
57,269

 
67,974

Income taxes
$
373,900

 
276,789

 
133,283

 
 
 
 
 
 
Supplemental schedule of non-cash investing and financing activities:
 
 
 
 
 
Additions to property, plant and equipment
$
30,643

 
—

 
—

 
 
 
 
 
 
Fair value of net assets acquired in acquisition
$
369,956

 
—

 
1,564,970

Noncontrolling interest of assets acquired
—

 
—

 
(24,160
)
Liabilities assumed in acquisition
(119,157
)
 
—

 
(17,147
)
Shares issued for acquisitions
—

 
—

 
(153,096
)
 
$
250,799

 
—

 
1,370,567