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Unconsolidated Subsidiaries (Tables)
6 Months Ended
Jun. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Variable Interest Entities
Summarized financial information for the ten unconsolidated operations is as follows:
 
THREE MONTHS ENDED
 
SIX MONTHS ENDED
 
JUNE 30
 
JUNE 30
 
2013
 
2012
 
2013
 
2012
Revenues
$
141,302

 
$
135,004

 
$
280,938

 
$
269,382

Gross profit
$
17,515

 
$
18,236

 
$
37,012

 
$
37,399

Income before income taxes
$
10,695

 
$
11,018

 
$
23,478

 
$
23,597

Net income
$
8,191

 
$
8,915

 
$
17,992

 
$
18,397