Finance Receivables And Allowance For Credit Losses (Schedule Of Recorded Investment In Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	$ 11,192	$ 14,577
Allowance, ending balance - collectively evaluated for impairment	43,300	57,732
Allowance, ending balance- loans acquired with deteriorated credit quality	2,625
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	943
Total allowance for credit losses	58,060	72,309
Loans and leases outstanding, ending balance - individually evaluated for impairment	75,063	53,321
Loans and leases outstanding, ending balance - collectively evaluated for impairment	4,042,599	3,690,130
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	23,181
Financing receivable, covered loans acquired with deteriorated credit quality	626,360
Total loans and leases outstanding	4,767,203	3,743,451
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	7,015	6,063
Allowance, ending balance - collectively evaluated for impairment	12,816	20,141
Allowance, ending balance- loans acquired with deteriorated credit quality	128
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	5
Total allowance for credit losses	19,964	26,204	26,869
Loans and leases outstanding, ending balance - individually evaluated for impairment	31,838	23,944
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,183,675	1,187,455
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	1,141
Financing receivable, covered loans acquired with deteriorated credit quality	124,755
Total loans and leases outstanding	1,341,409	1,211,399
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	4,177	8,514
Allowance, ending balance - collectively evaluated for impairment	21,397	24,140
Allowance, ending balance- loans acquired with deteriorated credit quality	1,288
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	131
Total allowance for credit losses	26,993	32,654	27,138
Loans and leases outstanding, ending balance - individually evaluated for impairment	43,225	29,377
Loans and leases outstanding, ending balance - collectively evaluated for impairment	1,002,105	913,018
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	22,040
Financing receivable, covered loans acquired with deteriorated credit quality	325,934
Total loans and leases outstanding	1,393,304	942,395
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	0	0
Allowance, ending balance - collectively evaluated for impairment	6,335	11,142
Allowance, ending balance- loans acquired with deteriorated credit quality	445
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	174
Total allowance for credit losses	6,954	11,142	13,853
Loans and leases outstanding, ending balance - individually evaluated for impairment	0	0
Loans and leases outstanding, ending balance - collectively evaluated for impairment	861,361	924,952
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	0
Financing receivable, covered loans acquired with deteriorated credit quality	128,700
Total loans and leases outstanding	990,061	924,952
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	0	0
Allowance, ending balance - collectively evaluated for impairment	2,752	2,309
Allowance, ending balance- loans acquired with deteriorated credit quality	764
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	633
Total allowance for credit losses	4,149	2,309	1,688
Loans and leases outstanding, ending balance - individually evaluated for impairment	0	0
Loans and leases outstanding, ending balance - collectively evaluated for impairment	995,458	664,705
Loans and leases outstanding, ending balance - loans acquired with deteriorated credit quality	0
Financing receivable, covered loans acquired with deteriorated credit quality	46,971
Total loans and leases outstanding	1,042,429	664,705
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, ending balance - individually evaluated for impairment	0	0
Allowance, ending balance - collectively evaluated for impairment	0	0
Allowance, ending balance- loans acquired with deteriorated credit quality	0
Financing receivable, allowance for credit losses, covered loans acquired with deteriorated credit quality	0
Total allowance for credit losses	0	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
Financing receivable, covered loans acquired with deteriorated credit quality	0
Total loans and leases outstanding	$ 0	$ 0