Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 504,494	$ 404,443	$ 409,293
Income taxes paid (refund)	3,375	4,340	(5,935)
Increase (decrease) in the fair value of forward-starting interest rate swaps (note 7)	0	0	(114,157)
Assets acquired through capital leases and installment sales	58,638	27,094	18,682
Conversion of redeemable convertible preferred stock (note 10)	305,180	0	0
Assumption of WCP Securitized Notes	$ 336,273	$ 0	$ 0

The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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