Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2013

Supplemental Cash Flow Information [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION

SUPPLEMENTAL CASH FLOW INFORMATION

During the six months ended June 30, 2013, we paid $127.9 million in interest, net of amounts capitalized, and received $7.6 million in net refunds from income taxes. During the six months ended June 30, 2012, we paid $118.0 million in interest, net of amounts capitalized, and paid $21.0 million in income taxes, net of refunds.

As of June 30, 2013 and 2012, the amount of accounts payable related to capital expenditures was $10.2 million and $18.8 million, respectively.

During the six months ended June 30, 2013 and 2012, total amortization of deferred revenue was $28.8 million and $27.5 million, respectively.

During the six months ended June 30, 2013 and 2012, our equity in earnings from ATC was $33.9 million and $31.8 million, respectively. During the six months ended June 30, 2013 and 2012, distributions received from ATC were $26.8 million and $25.8 million, respectively.