Mortgage Loans (Schedule of Acquisition of Mortgage Loans) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Mar. 27, 2014	Aug. 28, 2013	Jul. 25, 2013	May 30, 2013		May 31, 2013	Mar. 22, 2013
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance of loans acquired	$ 100.4	$ 98.2	$ 162.4			$ 134.5	$ 17.7
Line of Credit Facility [Line Items]
Utilization of facility				10.6
Loan Repurchase Facility [Member]
Line of Credit Facility [Line Items]
Utilization of facility	$ 60.6	$ 54.8	$ 98.7		[1]	$ 78.5

[1] On May 30, 2013, the Company entered into the Loan Repurchase Facility and utilized $10.6 million of the Loan Repurchase Facility to finance its then existing residential mortgage loan portfolio.