Fair Value Measurements (Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	$ 291,992	$ 286,599	$ 292,442
Loans held for sale, net	213
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	3,752	4,398
Interest bearing deposits with other banks	13,441	28,294
Securities available for sale	291,992	286,599
Other investments	16,100	19,146
Loans held for sale, net	213
Loans, net	940,933	965,516
Accrued interest receivable	5,352	5,784
Total assets	1,271,783	1,309,737
Deposits	1,027,307	1,016,500
Short-term borrowings	20,957	15,956
Long-term borrowings	203,744	270,254
Subordinated debentures	16,800	16,800
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Accrued interest payable	1,963	2,558
Total liabilities	1,290,360	1,341,657
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	3,752	4,398
Interest bearing deposits with other banks	13,441	28,294
Securities available for sale	291,992	286,599
Other investments	16,100	19,146
Loans held for sale, net	213
Loans, net	975,347	977,782
Accrued interest receivable	5,352	5,784
Total assets	1,306,197	1,322,003
Deposits	1,065,036	1,054,093
Short-term borrowings	20,957	15,956
Long-term borrowings	222,022	291,099
Subordinated debentures	16,800	16,800
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Accrued interest payable	1,963	2,558
Total liabilities	$ 1,346,367	$ 1,400,095