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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets by Major Class
Activity related to intangible assets, net consisted of the following:
 
Contracts
 
Customer
Relations
 
Trade Names
 
Permits and
Licenses
 
Total
Predecessor
 
 
 
 
 
 
 
 
 
Balance at January 1, 2010
$
126,332

 
$
35,362

 
$
30,508

 
$
5,092

 
$
197,294

Amortization
(3,322
)
 
(817
)
 
(975
)
 
(214
)
 
(5,328
)
Balance at May 25, 2010
$
123,010

 
$
34,545

 
$
29,533

 
$
4,878

 
$
191,966

 
Customer
Relations
 
Trade Names
 
Total
 
 
 
 
Successor
 
 
 
 
 
 
 
 
 
Balance at May 26, 2010
$
600,860

 
$
65,500

 
$
666,360

 
 
 
 
Additions
119,379

 
—

 
119,379

 
 
 
 
Amortization
(13,673
)
 
(1,911
)
 
(15,584
)
 
 
 
 
Balance at December 31, 2010
706,566

 
63,589

 
770,155

 
 
 
 
Amortization
(25,998
)
 
(3,274
)
 
(29,272
)
 
 
 
 
Balance at December 31, 2011
$
680,568

 
$
60,315

 
$
740,883