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Unconsolidated Subsidiaries (Tables)
6 Months Ended
Jun. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Variable Interest Entities
Summarized financial information for the unconsolidated subsidiaries is as follows:
 
THREE MONTHS ENDED
 
SIX MONTHS ENDED
 
JUNE 30
 
JUNE 30
 
2017
 
2016
 
2017
 
2016
Revenues
$
174,554

 
$
160,281

 
$
368,728

 
$
305,351

Gross profit
$
19,857

 
$
19,673

 
$
41,854

 
$
38,421

Income before income taxes
$
13,616

 
$
13,246

 
$
29,326

 
$
26,367

Net income
$
10,110

 
$
9,717

 
$
21,791

 
$
19,727