Derivative And Hedging Instruments (Schedule Of Terms Of Interest Rate Cap Agreements) (Details) (USD $)	Jun. 30, 2012		Dec. 31, 2011
Warehouse Facility II [Member]
Derivative [Line Items]
Cap Interest Rate	6.75%
Debt financing amount	$ 325,000,000	[1]
Warehouse Facility II [Member] | 6.75% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	07/2011		09/2010
End date	06/2013		06/2013
Notional value	325,000,000		325,000,000
Cap Interest Rate	6.75%	[2],[3]	6.75%	[2]
Debt financing amount	325,000,000		325,000,000
Warehouse Facility III [Member]
Derivative [Line Items]
Cap Interest Rate	6.75%
Debt financing amount	75,000,000	[1]
Notional amount in next fiscal year	56,300,000
Warehouse Facility III [Member] | 6.75% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	09/2010		09/2010
End date	09/2013		09/2013
Notional value	37,500,000		37,500,000
Cap Interest Rate	6.75%	[2],[3]	6.75%	[2]
Debt financing amount	75,000,000		75,000,000
Warehouse Facility III [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	06/2012
End date	07/2015
Notional value	18,800,000	[4]
Cap Interest Rate	5.00%	[2],[3]
Debt financing amount	75,000,000
Warehouse Facility IV [Member]
Derivative [Line Items]
Cap Interest Rate	5.50%
Debt financing amount	75,000,000	[1]
Warehouse Facility IV [Member] | 5.5% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	08/2011		08/2011
End date	03/2014		03/2014
Notional value	75,000,000		75,000,000
Cap Interest Rate	5.50%	[2],[3]	5.50%	[2]
Debt financing amount	$ 75,000,000		$ 75,000,000

[1] Financing made available only to a specified subsidiary of the Company.

[2] Rate excludes the spread over the LIBOR rate or the commercial paper rate, as applicable.The notional amount increases to $56.3 million in September 2013 when the original Warehouse Facility III interest rate cap for $37.5 million ends..

[3] Rate excludes the spread over the LIBOR rate or the commercial paper rate, as applicable.

[4] The notional amount increases to $56.3 million in September 2013 when the original Warehouse Facility III interest rate cap for $37.5 million ends..