Noncontrolling Interests (Narrative) (Details)	Mar. 31, 2014
Noncontrolling Interests [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Operating Partnership (OP) Units (in shares)	15,583,853
Long-Term Incentive Plan (LTIP) Units (in shares)	1,554,353
Series Two Preferred Units (in shares)	666,116
Convertible Operating Partnership (OP) Units (in shares)	874,168
Series Four Preferred Units (in shares)	360,126
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)	394,590
MYLTIP [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
2013 MYLTIP	314,974
MYLTIP 2014 [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Two thousand fourteen MYLTIP	483,555