Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans transferred to property acquired through foreclosure or repossession	$ 1,810	$ 801
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,792	3,292
Property acquired through foreclosure or repossession	1,070	1,449
Total sssets at fair value on a nonrecurring basis	3,862	4,741
Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans
Property acquired through foreclosure or repossession
Total sssets at fair value on a nonrecurring basis
Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans
Property acquired through foreclosure or repossession
Total sssets at fair value on a nonrecurring basis
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	2,792	3,292
Property acquired through foreclosure or repossession	1,070	1,449
Total sssets at fair value on a nonrecurring basis	3,862	4,741
Allowance For Loan Loss Allocation on Collateral Dependent Impaired Loans	733	900
Loans transferred to property acquired through foreclosure or repossession	$ 1,810	$ 801