Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,448,398	$ 2,114,206
30 - 59 days past due	12,207	8,374
60 - 89 days past due	2,325	1,574
Over 90 days past due	16,573	3,021
Non-accrual	17,520	19,194
Loans, Total	2,497,023	2,146,369
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,062,188	2,051,784
30 - 59 days past due	7,074	8,365
60 - 89 days past due	1,542	1,527
Over 90 days past due	374	280
Non-accrual	17,520	19,194
Loans, Total	2,088,698	2,081,150
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	386,210	62,422
30 - 59 days past due	5,133	9
60 - 89 days past due	783	47
Over 90 days past due	16,199	2,741
Loans, Total	408,325	65,219
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,137,703	1,023,633
30 - 59 days past due	6,773	4,910
60 - 89 days past due	476	599
Over 90 days past due	1,399	239
Non-accrual	3,060	2,054
Loans, Total	1,149,411	1,031,435
Residential Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,051,487	1,008,190
30 - 59 days past due	5,132	4,910
60 - 89 days past due	434	599
Over 90 days past due	323	239
Non-accrual	3,060	2,054
Loans, Total	1,060,436	1,015,992
Residential Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	86,216	15,443
30 - 59 days past due	1,641
60 - 89 days past due	42
Over 90 days past due	1,076
Loans, Total	88,975	15,443
Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	137,449	139,105
30 - 59 days past due	718	2,379
60 - 89 days past due	108	477
Over 90 days past due	32	37
Non-accrual	26	1,112
Loans, Total	138,333	143,110
Home equity - junior lien [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	103,007	132,847
30 - 59 days past due	718	2,379
60 - 89 days past due	108	477
Over 90 days past due	32	37
Non-accrual	26	1,112
Loans, Total	103,891	136,852
Home equity - junior lien [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	34,442	6,258
Loans, Total	34,442	6,258
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	137,991	107,141
30 - 59 days past due	2,040	260
60 - 89 days past due	892	236
Over 90 days past due	8,633	1,004
Non-accrual	121	98
Loans, Total	149,677	108,739
Commercial And Industrial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	104,758	105,989
30 - 59 days past due	79	260
60 - 89 days past due	224	236
Over 90 days past due	17
Non-accrual	121	98
Loans, Total	105,199	106,583
Commercial And Industrial [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	33,233	1,152
30 - 59 days past due	1,961
60 - 89 days past due	668
Over 90 days past due	8,616	1,004
Loans, Total	44,478	2,156
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	978,390	803,614
30 - 59 days past due	1,548	442
60 - 89 days past due	767	246
Over 90 days past due	6,435	1,738
Non-accrual	14,313	15,930
Loans, Total	1,001,453	821,970
Commercial Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	767,733	766,404
30 - 59 days past due	736	433
60 - 89 days past due	767	199
Over 90 days past due		1
Non-accrual	14,313	15,930
Loans, Total	783,549	782,967
Commercial Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	210,657	37,210
30 - 59 days past due	812	9
60 - 89 days past due		47
Over 90 days past due	6,435	1,737
Loans, Total	217,904	39,003
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	54,327	36,443
30 - 59 days past due	795	113
60 - 89 days past due	79	8
Over 90 days past due	73
Loans, Total	55,274	36,564
Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	32,665	34,084
30 - 59 days past due	76	113
60 - 89 days past due	6	8
Over 90 days past due	1
Loans, Total	32,748	34,205
Consumer [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	21,662	2,359
30 - 59 days past due	719
60 - 89 days past due	73
Over 90 days past due	72
Loans, Total	22,526	2,359
DDA Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,538	4,270
30 - 59 days past due	333	270
60 - 89 days past due	3	8
Over 90 days past due	1	3
Loans, Total	2,875	4,551
DDA Overdrafts [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,538	4,270
30 - 59 days past due	333	270
60 - 89 days past due	3	8
Over 90 days past due	1	3
Loans, Total	2,875	4,551
DDA Overdrafts [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current
30 - 59 days past due
60 - 89 days past due
Over 90 days past due
Non-accrual
Loans, Total