Business (Details)	Sep. 30, 2014	Mar. 31, 2013
Noncontrolling Interest, Ownership Percentage by Parent	96.20%
Number of Real Estate Properties	396
Number of States in which Entity Operates	12
Number of Units in Real Estate Property	111,087
Consolidated Properties [Member]
Number of Real Estate Properties	368
Number of Units in Real Estate Property	99,789
Master-Leased Properties [Member]
Number of Real Estate Properties		3
Number of Units in Real Estate Property	853
Partially Owned Properties [Member]
Number of Real Estate Properties	19
Number of Units in Real Estate Property	3,771
Unconsolidated Properties [Member]
Number of Real Estate Properties	4
Number of Units in Real Estate Property	1,669
Military Housing [Member]
Number of Real Estate Properties	2
Number of Units in Real Estate Property	5,005