3. Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Available for sale securities, fair value	$ 281,865	$ 288,780	$ 283,054
Interest rate swap		803
U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	28,316	29,657
Government Sponsored Agencies [Member]
Available for sale securities, fair value	143,814	155,716
Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	10,787	11,819
U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	10,731	15,870
Corporate Debt Securities [Member]
Available for sale securities, fair value	3,998	3,966
Equity Securities [Member]
Available for sale securities, fair value	77	77
Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value	84,142	71,675
Fair Value Inputs Level1 [Member]
Available for sale securities, fair value
Interest rate swap
Fair Value Inputs Level1 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | Equity Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level1 [Member] | Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value
Fair Value Inputs Level2 [Member]
Available for sale securities, fair value	281,865	288,780
Interest rate swap		803
Fair Value Inputs Level2 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	28,316	29,657
Fair Value Inputs Level2 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value	143,814	155,716
Fair Value Inputs Level2 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	10,787	11,819
Fair Value Inputs Level2 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	10,731	15,870
Fair Value Inputs Level2 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value	3,998	3,966
Fair Value Inputs Level2 [Member] | Equity Securities [Member]
Available for sale securities, fair value	77	77
Fair Value Inputs Level2 [Member] | Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value	84,142	71,675
Fair Value Inputs Level2 [Member] | Interest rate swap [Member]
Interest rate swap		803
Fair Value Inputs Level3 [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | Equity Securities [Member]
Available for sale securities, fair value
Fair Value Inputs Level3 [Member] | Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value