Fair Value Measurements (Narrative) (Details) (Nonrecurring [Member], Level 3 [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation adjustments charged to allowance on property acquired through foreclosure or repossession	$ 268	$ 124	$ 332	$ 124
Valuation adjustments charged to earnings on property acquired through foreclosure or repossession	$ 52	$ 238	$ 171	$ 238