Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 28, 2013 Six Hundred Fifteen Unit Apartment Complex in Northern CA [Member]	Mar. 31, 2013 Note Receivable Due 2016 Notes Receivable [Member] Unit	Feb. 28, 2014 KWE [Member] Property
Contribution of interest percentage in portfolio				50.00%
Number of Properties Held in Portfolio Contributed to New Entity				14
Number of Units in Real Estate Property			107
Equity Method Investment, Ownership Percentage		15.00%
Consolidated Investment, Ownership Percentage		94.00%
Note Receivable, Ownership Percentage Sold			50.00%
Notes Receivable, Decrease from Deconsolidation	$ 96.0
Mortgage Loans, Decrease from Deconsolidation	$ 78.7