Schedule of Interest Rate Caps (Details) (RHDI, Interest Rate Caps, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2010	Jun. 30, 2012		Dec. 31, 2011
Derivative [Line Items]
Amount Paid for Interest Rate Caps	$ 2.1
Notional Amount		200.0		400.0
February 26, 2010
Derivative [Line Items]
Notional Amount		100.0	[1]
Cap Rates		3.50%
March 8, 2010
Derivative [Line Items]
Notional Amount		$ 100.0	[1]
Cap Rates		3.50%

[1] Consists of one cap