Derivative Financial Information - Schedule of Interest Rate Caps (Details) (RHDI, Interest Rate Cap – Assets, USD $)			3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2010 Successor Company	Dec. 31, 2012 Successor Company	Dec. 31, 2012 Successor Company February 26, 2010		Dec. 31, 2012 Successor Company March 8, 2010
Derivative [Line Items]
Amount Paid for Interest Rate Caps			$ 2,100,000
Notional Amount	$ 200,000,000	$ 400,000,000		$ 200,000,000	$ 100,000,000	[1]	$ 100,000,000	[1]
Cap Rates					3.50%		3.50%

[1] Consists of one cap