Debt (Summary Of Additional Information Of Credit facilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revolving Secured Line Of Credit [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	$ 139,000	$ 165,400	$ 187,300	$ 165,400
Average outstanding balance	100,133	113,098	98,876	108,262
Warehouse Facility II [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	173,800	264,000	177,200	264,000
Secured financings, average amount outstanding	143,733	215,522	128,606	184,224
Warehouse Facility III [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	62,000	75,000	73,000	75,000
Secured financings, average amount outstanding	51,423	73,587	60,760	47,436
Warehouse Facility IV [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	39,200	43,500	39,600	43,500
Secured financings, average amount outstanding	$ 37,809	$ 41,895	$ 37,847	$ 41,895