Fair Value (Reconciliation of all Assets Measured at Fair Value on Recurring Basis, Using Significant Unobservable Inputs (Level 3)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Ending Balance of Recurring Level 3 Assets		$ 0		$ 0
Obligations of State and Political Subdivisions [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance of Recurring Level 3 Assets	11,728	4,075	12,169	4,772
Total Gains or Losses (realized/unrealized) Included in Earnings	(129)	51	(150)	51
Maturities / Calls	(160)	0	(580)	(697)
Purchases	0	7,665	0	7,665
Ending Balance of Recurring Level 3 Assets	11,439	11,791	11,439	11,791
Equity Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance of Recurring Level 3 Assets	353	353	353	353
Total Gains or Losses (realized/unrealized) Included in Earnings	0	0	0	0
Maturities / Calls	0	0	0	0
Purchases	0	0	0	0
Ending Balance of Recurring Level 3 Assets	353	353	353	353
Corporate Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance of Recurring Level 3 Assets	0	0	0	1,005
Total Gains or Losses (realized/unrealized) Included in Earnings	0	0	0	0
Maturities / Calls	0	0	0	(1,005)
Purchases	0	0	0	0
Ending Balance of Recurring Level 3 Assets	$ 0	$ 0	$ 0	$ 0