Unsecured Revolving Credit Facility (Change In The Operating Partnership's Unsecured Debt Ratings) (Details)	0 Months Ended	9 Months Ended
Jul. 15, 2013	Sep. 30, 2013 No Ratings Or Less Than BBB-/Baa3 [Member]	Sep. 30, 2013 BBB- Or Baa3 [Member]	Sep. 30, 2013 BBB Or Baa2 (Current) [Member]	Sep. 30, 2013 BBB+ Or Baa1 [Member]	Sep. 30, 2013 A- Or A3 Or Higher [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings		No ratings or less than BBB-/Baa3	BBB- or Baa3	BBB or Baa2(current)	BBB+ or Baa1	A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR	1.25%	1.70%	1.30%	1.10%	1.00%	0.925%
Facility Fee Basis Points		0.35%	0.30%	0.20%	0.15%	0.125%

Description of the credit rating indicative of likelihood of repayment of the debt instrument given by a credit rating agency (for example, Standard and Poor's, Moody's, Fitch).

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration