Finance Receivables And Allowance For Credit Losses (Schedule Of Recorded Investment In Financing Receivables) (Details) (USD $)	Sep. 30, 2011		Dec. 31, 2010
Allowance, ending balance - individually evaluated for impairment	$ 16,036,000		$ 14,577,000
Allowance, ending balance - collectively evaluated for impairment	48,804,000		57,732,000
Loans acquired with deteriorated credit quality, ending balance	379,000
Loans and leases outstanding, ending balance	4,140,060,000		3,743,451,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	81,694,000		53,321,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	4,032,256,000		3,690,130,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	26,110,000	[1]
Revolving credits	166,400,000
Commercial [Member]
Allowance, ending balance - individually evaluated for impairment	8,803,000		6,063,000
Allowance, ending balance - collectively evaluated for impairment	14,977,000		20,141,000
Loans acquired with deteriorated credit quality, ending balance	88,000
Loans and leases outstanding, ending balance	1,246,289,000		1,211,399,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	34,296,000		23,944,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,210,155,000		1,187,455,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	1,838,000	[1]
Commercial Real Estate [Member]
Allowance, ending balance - individually evaluated for impairment	7,233,000		8,514,000
Allowance, ending balance - collectively evaluated for impairment	22,752,000		24,140,000
Loans acquired with deteriorated credit quality, ending balance	291,000
Loans and leases outstanding, ending balance	1,128,374,000		942,395,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	47,398,000		29,377,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,057,039,000		913,018,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	23,937,000	[1]
Consumer [Member]
Allowance, ending balance - individually evaluated for impairment	0		0
Allowance, ending balance - collectively evaluated for impairment	7,927,000		11,142,000
Loans acquired with deteriorated credit quality, ending balance	0
Loans and leases outstanding, ending balance	899,446,000		924,952,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	0		0
Loans and leases outstanding, ending balance - collectively evaluated for impairment	899,307,000		924,952,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	139,000	[1]
Residential [Member]
Allowance, ending balance - individually evaluated for impairment	0		0
Allowance, ending balance - collectively evaluated for impairment	3,148,000		2,309,000
Loans acquired with deteriorated credit quality, ending balance	0
Loans and leases outstanding, ending balance	865,951,000		664,705,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	0		0
Loans and leases outstanding, ending balance - collectively evaluated for impairment	865,755,000		664,705,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	196,000	[1]
Unallocated [Member]
Allowance, ending balance - individually evaluated for impairment	0		0
Allowance, ending balance - collectively evaluated for impairment	0		0
Loans acquired with deteriorated credit quality, ending balance	0
Loans and leases outstanding, ending balance	0		0
Loans and leases outstanding, ending balance - individually evaluated for impairment	0		0
Loans and leases outstanding, ending balance - collectively evaluated for impairment	0		0
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	$ 0	[1]

[1] Includes $166.4 million of revolving credits not accounted for under ASC 310-30.