Fair Value Disclosures (Measured on a Non-Recurring Basis) (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Total gains (losses) on impaired loans	$ 0	$ 0
Total gains (losses) on foreclosed properties	(119,000)	(621,000)
Impaired loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	9,754,000	12,787,000
Impaired loans | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	0	0
Impaired loans | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	7,250,000	12,787,000
Impaired loans | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	2,504,000	0
Foreclosed properties
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	1,937,000	2,236,000
Foreclosed properties | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	0	138,000
Foreclosed properties | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	1,937,000	1,989,000
Foreclosed properties | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis
Assets measured on a non-recurring basis, fair value	$ 0	$ 109,000