Fair Value Measurements (Narrative) (Details) (Nonrecurring [Member], Level 3 [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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	$ 65	$ 0	$ 397	$ 124
Valuation adjustments charged to earnings on property acquired through foreclosure or repossession	$ 127	$ 0	$ 298	$ 392