Fair Value (Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis) (Details) (Level 3 [Member], Fair Value, Measurements, Recurring [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
Obligations Of States And Political Subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ 0	$ 2,470		$ 2,598
Included in earnings - unrealized	0	0	0	(128)
Included in other comprehensive income	0
Periodic, sales, issuances and settlements, other	0	(2,470)	0	(2,470)
Periodic settlement of fair value swap	0
Balance, ending	0		0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	756	740	763	745
Included in earnings - unrealized	0	0	0	0
Included in other comprehensive income	(18)	1	(25)	(4)
Periodic, sales, issuances and settlements, other	0	0	0	0
Periodic settlement of fair value swap	0
Balance, ending	738	741	738	741
Fair Value Swap [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at January 1, 2012	(135)	(60)	(700)	(60)
Included in earnings - unrealized	0	0	0	0
Included in other comprehensive income	0
Purchases, sales, issuances and settlements, other	0	140	0	140
Periodic settlement of fair value swap	0		(565)
Balance at June 30, 2012	$ (135)	$ (200)	$ (135)	$ (200)