Derivative And Hedging Instruments (Schedule Of Terms Of Interest Rate Cap Agreements) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Derivative [Line Items]
Interest rate swap agreements outstanding	$ 100,000		$ 100,000
Warehouse Facility II [Member]
Derivative [Line Items]
Debt financing amount	325,000,000	[1]
Warehouse Facility II [Member] | 6.75% Cap Interest Rate [Member]
Derivative [Line Items]
Start date			07/2011
End date			06/2013
Notional value			325,000,000
Cap Interest Rate			6.75%	[2]
Debt financing amount			325,000,000
Warehouse Facility II [Member] | 5.5% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	06/2013
End date	12/2014
Notional value	325,000,000
Cap Interest Rate	5.50%	[2]
Debt financing amount	325,000,000
Warehouse Facility III [Member]
Derivative [Line Items]
Debt financing amount	75,000,000	[1]
Warehouse Facility III [Member] | 6.75% Cap Interest Rate [Member]
Derivative [Line Items]
Start date			09/2010
End date			09/2013
Notional value			37,500,000
Cap Interest Rate			6.75%	[2]
Debt financing amount			75,000,000
Warehouse Facility III [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Start date	06/2012		06/2012
End date	07/2015		07/2015
Notional value	56,300,000		18,800,000	[3]
Cap Interest Rate	5.00%	[2]	5.00%	[2]
Debt financing amount	75,000,000		75,000,000
Derivative instrument notional value in third quarter of this year	56,300,000
Warehouse Facility IV [Member]
Derivative [Line Items]
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	09/2015		09/2015
Notional value	75,000,000	[3]	75,000,000
Cap Interest Rate	5.50%	[2]	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.

[3] 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.