Finance Receivables And Allowance For Credit Losses (Schedule Of Recorded Investment On Payment Activity) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Residential [Member] | Performing [Member]
Financing Receivable Recorded Investment	$ 856,717	$ 655,986
Performing [Member] | Consumer, Heloc [Member]
Financing Receivable Recorded Investment	244,458	246,390
Performing [Member] | Consumer, Auto [Member]
Financing Receivable Recorded Investment	485,834	494,771
Performing [Member] | Consumer, Other [Member]
Financing Receivable Recorded Investment	164,052	177,470
Residential [Member] | Nonperforming [Member]
Financing Receivable Recorded Investment	9,234	8,719
Nonperforming [Member] | Consumer, Heloc [Member]
Financing Receivable Recorded Investment	1,228	1,903
Nonperforming [Member] | Consumer, Auto [Member]
Financing Receivable Recorded Investment	2,149	2,331
Nonperforming [Member] | Consumer, Other [Member]
Financing Receivable Recorded Investment	1,725	2,087
Consumer, Heloc [Member]
Financing Receivable Recorded Investment	245,686	248,293
Consumer, Auto [Member]
Financing Receivable Recorded Investment	487,983	497,102
Consumer, Other [Member]
Financing Receivable Recorded Investment	165,777	179,557
Residential [Member]
Financing Receivable Recorded Investment	$ 865,951	$ 664,705