Fair Value Measurements (Narrative) (Details) (Nonrecurring [Member], Level 3 [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Allowance For Loan Loss Allocation on Collateral Dependent Impaired Loans	$ 442	$ 2,000