Debt (Summary Of Additional Information Of Credit facilities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revolving Secured Line Of Credit [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	$ 204.7	$ 179.3
Average outstanding balance	80.6	73.3
Warehouse Facility II [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	162.6	153.6
Average outstanding balance	58.4	90.0
Warehouse Facility III [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	75.0
Average outstanding balance	8.5
Warehouse Facility IV [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	26.6	39.6
Average outstanding balance	$ 15.9	$ 37.7