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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information
The following table is a summary of the supplemental cash flow information during the years ended December 31, 2013, 2012 and 2011.
 
Years Ended December 31,
 
2013

2012

2011
Supplemental disclosure of cash flow information:
 
 
 
 
 
Interest paid
$
477,395

 
$
504,494

 
$
404,443

Income taxes paid
15,591

 
3,375

 
4,340

Supplemental disclosure of non-cash investing and financing activities:
 
 
 
 
 
Increase in liabilities for purchases of property and equipment
56,279

 
58,638

 
27,094

Conversion of 6.25% Redeemable Convertible Preferred Stock (note 11)
—

 
305,180

 
—

Assumption of WCP Securitized Notes
—

 
336,273

 
—