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Unconsolidated Subsidiaries (Tables)
6 Months Ended
Jun. 30, 2015
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
 
2015
 
2014
 
2015
 
2014
Revenues
$
155,103

 
$
148,075

 
$
303,174

 
$
286,598

Gross profit
$
18,068

 
$
17,126

 
$
36,946

 
$
36,619

Income before income taxes
$
12,531

 
$
10,994

 
$
25,650

 
$
24,162

Net income
$
9,563

 
$
8,530

 
$
19,718

 
$
18,674