Finance Receivables And Allowance For Credit Losses (Schedule Of Recorded Investment In Financing Receivables) (Details) (USD $)	Jun. 30, 2011		Dec. 31, 2010
Allowance, ending balance - individually evaluated for impairment	$ 17,898,000		$ 14,577,000
Allowance, ending balance - collectively evaluated for impairment	48,501,000		57,732,000
Loans acquired with deteriorated credit quality, ending balance	3,790,000
Loans and leases outstanding, ending balance	4,117,341,000		3,743,451,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	74,004,000		53,321,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	4,012,959,000		3,690,130,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	30,378,000	[1]
Revolving credits	2,400,000
Commercial [Member]
Allowance, ending balance - individually evaluated for impairment	10,162,000		6,063,000
Allowance, ending balance - collectively evaluated for impairment	14,314,000		20,141,000
Loans acquired with deteriorated credit quality, ending balance	1,553,000
Loans and leases outstanding, ending balance	1,269,607,000		1,211,399,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	34,099,000		23,944,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,233,250,000		1,187,455,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	2,258,000	[1]
Commercial Real Estate [Member]
Allowance, ending balance - individually evaluated for impairment	7,736,000		8,514,000
Allowance, ending balance - collectively evaluated for impairment	22,517,000		24,140,000
Loans acquired with deteriorated credit quality, ending balance	2,237,000
Loans and leases outstanding, ending balance	1,170,401,000		942,395,000
Loans and leases outstanding, ending balance - individually evaluated for impairment	39,905,000		29,377,000
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,103,054,000		913,018,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	27,442,000	[1]
Consumer [Member]
Allowance, ending balance - individually evaluated for impairment	0		0
Allowance, ending balance - collectively evaluated for impairment	8,558,000		11,142,000
Loans acquired with deteriorated credit quality, ending balance	0
Loans and leases outstanding, ending balance	881,891,000		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	881,709,000		924,952,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	182,000	[1]
Residential [Member]
Allowance, ending balance - individually evaluated for impairment	0		0
Allowance, ending balance - collectively evaluated for impairment	3,112,000		2,309,000
Loans acquired with deteriorated credit quality, ending balance	0
Loans and leases outstanding, ending balance	795,442,000		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	794,946,000		664,705,000
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	496,000	[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 $2.4 million of revolving credits not accounted for under ASC 310-30.