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Unconsolidated Subsidiaries (Tables)
3 Months Ended
Mar. 31, 2016
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
 
MARCH 31
 
2016
 
2015
Revenues
$
145,070

 
$
148,071

Gross profit
$
18,748

 
$
18,878

Income before income taxes
$
13,121

 
$
13,119

Net income
$
10,010

 
$
10,155