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Fair Value Disclosures (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Disclosures  
Estimated Fair Values and Carrying Amounts of Assets and Liabilities
 
Level in Fair Value Hierarchy
 
June 30, 2013
 
December 31, 2012
 
 
Carrying
 Amount
 
Fair
Value
 
Carrying
 Amount
 
Fair
Value
Assets:
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
1
 
$
126,886

 
$
126,886

 
$
441,364

 
$
441,364

Restricted cash, current and non-current
1
 
166,541

 
166,541

 
580,938

 
580,938

Liabilities:
 
 
 
 
 
 
 
 
 
Long-term debt and other obligations
2
 
10,788,522

 
11,107,927

 
11,611,242

 
12,438,032