Derivative And Hedging Instruments (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
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] | 5.5% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	325,000,000		325,000,000
Start date	06/2013		06/2013
End date	12/2014		12/2014
Notional value	325,000,000		325,000,000
Cap Interest Rate	5.50%	[2]	5.50%	[2]
Warehouse Facility III [Member]
Derivative [Line Items]
Debt financing amount	75,000,000	[1]
Warehouse Facility III [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	75,000,000		75,000,000
Start date	06/2012		06/2012
End date	07/2015		07/2015
Notional value	56,300,000		56,300,000
Cap Interest Rate	5.00%	[2]	5.00%	[2]
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]
Debt financing amount	75,000,000		75,000,000
Start date	08/2011		08/2011
End date	09/2015		09/2015
Notional value	69,800,000		75,000,000
Cap Interest Rate	5.50%	[2]	5.50%	[2]
Warehouse Facility IV Starting March 2014 [Member] | 5.5% Cap Interest Rate [Member]
Derivative [Line Items]
Debt financing amount	75,000,000
Start date	03/2014
End date	03/2017
Notional value	$ 5,200,000
Cap Interest Rate	5.50%	[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.