3. Fair Value Measurements (Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Securities available for sale	$ 291,180,000	$ 281,539,000	$ 289,151,000
Loans held for sale, net	1,080,000	226,000
Carrying Reported Amount Fair Value Disclosure [Member]
Cash and cash equivalents	12,307,000	14,802,000
Interest bearing deposits with other banks	0	0
Securities available for sale	291,180,000	281,539,000
Other investments	7,411,000	14,658,000
Loans held for sale, net	1,080,000	226,000
Loans, net	925,979,000	937,168,000
Accrued interest receivable	5,718,000	5,621,000
Total assets	1,243,675,000	1,254,014,000
Deposits	1,038,163,000	1,027,125,000
Short-term borrowings	16,762,000	3,958,000
Long-term borrowings	163,565,000	203,268,000
Subordinated debentures	16,800,000	16,800,000
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589,000	19,589,000
Accrued interest payable	1,610,000	1,877,000
Total liabilities	1,256,489,000	1,272,617,000
Estimate Of Fair Value Fair Value Disclosure [Member]
Cash and cash equivalents	12,307,000	14,802,000
Interest bearing deposits with other banks	0	0
Securities available for sale	291,180,000	281,539,000
Other investments	7,411,000	14,658,000
Loans held for sale, net	1,080,000	226,000
Loans, net	945,069,000	965,454,000
Accrued interest receivable	5,718,000	5,621,000
Total assets	1,262,765,000	1,282,300,000
Deposits	1,069,878,000	1,064,957,000
Short-term borrowings	16,762,000	3,958,000
Long-term borrowings	176,100,000	220,175,000
Subordinated debentures	16,800,000	16,800,000
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589,000	19,589,000
Accrued interest payable	1,610,000	1,877,000
Total liabilities	$ 1,300,739,000	$ 1,327,356,000