3. Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012		Sep. 30, 2012
Available for sale securities, fair value	$ 291,258	$ 281,539	[1]	$ 291,992
Interest rate swap	(117)
U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	28,430	29,020
Government Sponsored Agencies [Member]
Available for sale securities, fair value	150,787	136,570
Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	13,440	15,745
U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	15,011	12,169
Corporate Debt Securities [Member]
Available for sale securities, fair value	3,950	1,950
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	79,563	83,270
Tax Exempt Mortgage Backed Securities [Member]
Available for sale securities, fair value	0	2,738
Fair Value Inputs Level1 [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Equity Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level1 [Member] | Tax Exempt Mortgage Backed Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level2 [Member]
Available for sale securities, fair value	291,258	281,539
Interest rate swap	(117)
Fair Value Inputs Level2 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	28,430	29,020
Fair Value Inputs Level2 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value	150,787	136,570
Fair Value Inputs Level2 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	13,440	15,745
Fair Value Inputs Level2 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	15,011	12,169
Fair Value Inputs Level2 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value	3,950	1,950
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	79,563	83,270
Fair Value Inputs Level2 [Member] | Tax Exempt Mortgage Backed Securities [Member]
Available for sale securities, fair value	0	2,738
Fair Value Inputs Level3 [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | U S Government Corporations And Agencies Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Government Sponsored Agencies [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Nongovernment Sponsored Agencies [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | U S States And Political Subdivisions General Obligations [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Corporate Debt Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Equity Securities [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Tax Exempt Debt Securities Us States And Political Subdivisions [Member]
Available for sale securities, fair value	0	0
Fair Value Inputs Level3 [Member] | Tax Exempt Mortgage Backed Securities [Member]
Available for sale securities, fair value	$ 0	$ 0

[1] December 31, 2012 financial information has been extracted from audited consolidated financial statements