Noncontrolling Interests (Narrative) (Details)	Sep. 30, 2013
Noncontrolling Interests [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Operating Partnership (OP) Units (in shares)	15,738,523
Long-Term Incentive Plan (LTIP) Units (in shares)	1,460,200
Series Two Preferred Units (in shares)	995,997
Convertible Operating Partnership (OP) Units (in shares)	1,307,083
Series Four Preferred Units (in shares)	360,126
OPP Units 2011 [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Outperformance awards in LTIP Units (in shares)	396,500
OPP Units 2012 [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Outperformance awards in LTIP Units (in shares)	396,150
MYLTIP [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
2013 MYLTIP	316,325