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Supplemental Cash Flow Information
12 Months Ended
Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information:
 
 
Year Ended December 31,
 
 
2011
 
2010
 
2009
 
 
(in thousands)
Cash paid for interest
 
$
247,702

 
$
255,960

 
$
248,800

Cash paid for income taxes
 
4,521

 
2,857

 
3,085


Non-cash investing and financing activities
The Company’s accrued purchases of property and equipment were $90.9 million, $102.6 million and $21.4 million as of December 31, 2011, 2010 and 2009, respectively. Included within the Company’s accrued purchases are estimates by management for construction services received based on a percentage of completion.

Assets acquired under capital lease obligations were $33.4 million, $76.6 million and $92.2 million for the years ended December 31, 2011, 2010 and 2009, respectively.

During the years ended December 31, 2011, 2010 and 2009, the Company returned obsolete network infrastructure assets to one of its vendors in exchange for $6.4 million, $24.4 million and $17.4 million in credits towards the purchase of additional network infrastructure assets with the vendor.

During the years ended December 31, 2010 and 2009, the Company received $53.4 million and $52.3 million in fair value of FCC licenses in exchanges with other parties.

The Company's accrued assets acquired in asset acquisitions were $8.0 million as of December 31, 2010.

See Note 2 for the non-cash changes in the Company's asset retirement obligations.