Fair Value (Schedule Of Fair Value Of Assets And Liabilities Recorded On Recurring Basis) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	$ 82,552	$ 57,105
Government Sponsored Enterprises [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	5,947	1,952
State And Municipal Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	7,275	5,493
Mortgage-Backed Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	67,228	46,928
Other Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	2,102	2,732
Level 1 [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	584	355
Level 1 [Member] | Government Sponsored Enterprises [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 1 [Member] | State And Municipal Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	584	355
Level 1 [Member] | Mortgage-Backed Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 1 [Member] | Other Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 2 [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	81,968	56,750
Level 2 [Member] | Government Sponsored Enterprises [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	5,947	1,952
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	6,691	5,138
Level 2 [Member] | Mortgage-Backed Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	67,228	46,928
Level 2 [Member] | Other Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis	2,102	2,732
Level 3 [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 3 [Member] | Government Sponsored Enterprises [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 3 [Member] | State And Municipal Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 3 [Member] | Mortgage-Backed Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis
Level 3 [Member] | Other Securities [Member]
Fair Value Assets Liabilities Measured On Recurring Basis [Line Items]
Assets recorded as fair value on a recurring basis