Fair Value Measurements (Financial Assets Measured at Fair Value on Nonrecurring Basis) (Details) (Fair value measurements, nonrecurring [Member], USD $)	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	$ 11,996,000	$ 11,991,000
Impaired loans net of partial charge-offs	2,142,000	4,227,000
Foreclosed assets	0	0
Total	14,138,000	16,218,000
Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	0	0
Impaired loans net of partial charge-offs	0	0
Total	0	0
Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	0	0
Impaired loans net of partial charge-offs	0	0
Total	0	0
Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Impaired loans with specific allocation	11,996,000	11,991,000
Impaired loans net of partial charge-offs	2,142,000	4,227,000
Total	$ 14,138,000	$ 16,218,000