Derivative and Hedging Instruments (Schedule of Terms of Interest Rate Cap Agreements) (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Derivative [Line Items]
Interest rate caps, fair value of less than $0.1 million	$ 100,000		$ 100,000
Warehouse Facility II [Member]
Derivative [Line Items]
Debt facility financing amount	325,000,000	[1]
Warehouse Facility II [Member] | 5.50% Cap Interest Rate [Member]
Derivative [Line Items]
Debt facility financing amount	325,000,000		325,000,000
Start	06/2013		06/2013
End	12/2014		12/2014
Notional	325,000,000		325,000,000
Cap Interest Rate	5.50%	[2]	5.50%	[2]
Warehouse Facility III [Member]
Derivative [Line Items]
Debt facility financing amount	75,000,000	[1]
Warehouse Facility III [Member] | 5.00% Cap Interest Rate [Member]
Derivative [Line Items]
Debt facility financing amount	75,000,000		75,000,000
Start	06/2012		06/2012
End	07/2015		07/2015
Notional	56,300,000		56,300,000
Cap Interest Rate	5.00%	[2]	5.00%	[2]
Warehouse Facility IV [Member]
Derivative [Line Items]
Debt facility financing amount	75,000,000	[1]
Warehouse Facility IV [Member] | 5.50% Cap Interest Rate [Member]
Derivative [Line Items]
Debt facility financing amount	75,000,000		75,000,000
Start	08/2011		08/2011
End	09/2015		09/2015
Notional	55,100,000		75,000,000
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 facility financing amount	75,000,000
Start	03/2014
End	03/2017
Notional	$ 19,900,000
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.