Schedule II: Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 112,453	$ 70,691	$ 28,402
Charged to Earnings	54,706	49,011	51,277
Acquired Properties	0	0	0
Uncollectible Accounts Written-off	(3,810)	(7,265)	(8,375)
Disposed Properties	(3,672)	16	(613)
Ending Balance	159,677	112,453	70,691
Allowance for doubtful accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	11,017	10,960	10,850
Charged to Earnings	8,204	6,071	8,235
Acquired Properties	0	0	0
Uncollectible Accounts Written-off	(4,272)	(6,013)	(7,739)
Disposed Properties	(419)	(1)	(386)
Ending Balance	14,530	11,017	10,960
Straight-line rent receivable allowance
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	101,436	59,731	17,552
Charged to Earnings	46,502	42,940	43,042
Acquired Properties	0	0	0
Uncollectible Accounts Written-off	462	(1,252)	(636)
Disposed Properties	(3,253)	17	(227)
Ending Balance	$ 145,147	$ 101,436	$ 59,731

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.

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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