Schedule II - Valuation and Qualifying Accounts (Details) (Allowance Accounts, USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance Accounts
Movement in Valuation Allowances and Reserves
Balance at the beginning of the year	$ 48,599	$ 49,209	$ 43,740
Additions
Amounts Charged Against Operations, net	2,633	3,724	13,316
Acquired Properties			2
Deductions
Uncollectible Accounts Written-off	(2,063)	(960)	(4,673)
Disposed Properties		(3,374)	(3,176)
Balance at the end of the year	$ 49,169	$ 48,599	$ 49,209

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- Definition

This element represents deductions to the valuation and qualifying accounts with respect to disposed or contributed properties.

+ References

No definition available.

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This element represents additions to the valuation and qualifying accounts with respect to acquired properties.

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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