Derivative And Hedging Instruments (Schedule Of Terms Of Interest Rate Cap Agreements) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Derivative [Line Items]
Debt financing amount	$ 300.0
Interest rate swap agreements outstanding	0.1
Warehouse Facility II [Member]
Derivative [Line Items]
Debt financing amount	325.0	[1]
Warehouse Facility II [Member] | 5.50% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	325.0		325.0
Start date	12/2014		06/2013
End date	06/2016		12/2014
Notional value	325.0		325.0
Cap Interest Rate	5.50%	[2]	5.50%	[2]
Warehouse Facility III [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount			75.0
Start date			06/2012
End date			07/2015
Notional value			56.3
Cap Interest Rate			5.00%	[2]
Warehouse Facility IV [Member]
Derivative [Line Items]
Debt financing amount	75.0	[1]
Warehouse Facility IV [Member] | 5.50% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	75.0		75.0
Start date	08/2011		08/2011
End date	09/2015		09/2015
Notional value	29.3		75.0	[3]
Cap Interest Rate	5.50%	[2]	5.50%	[2]
Warehouse Facility IV Member Starting March 2014 [Member] | 5.50% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	75.0
Start date	03/2014
End date	03/2017
Notional value	45.7
Cap Interest Rate	5.50%	[2]
Warehouse Facility V [Member]
Derivative [Line Items]
Debt financing amount	75.0	[1]
Warehouse Facility V [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	75.0
Start date	06/2012
End date	07/2015
Notional value	$ 56.3	[3]
Cap Interest Rate	5.00%	[2]

[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] In the third quarter of 2014, we formed a new wholly owned subsidiary, CAC Warehouse Funding LLC V, which replaced CAC Warehouse Funding III, LLC. The interest rate cap associated with this facility was reassigned from Warehouse Facility III to Warehouse Facility V.