Comprehensive Income Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	$ (770)	[1]	$ 1,210	[1]	$ (15)	[1]	$ (2,213)	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	(25)	[1]	236	[1]	104	[1]	382	[1]
Other Comprehensive Income (Loss), before Tax	(1,317)		2,394		146		(3,030)
Other Comprehensive Income (Loss), Tax	522		(948)		(57)		1,199
Other Comprehensive (Loss) Income	(795)	[1]	1,446	[1]	89	[1]	(1,831)	[1]
Unrealized Gains and Losses on Available for Sale Securities [Member]
Schedule of Comprehensive Income [Line Items]
Other Comprehensive Income Loss Before Reclassifications Before Tax	(1,274)		2,003		(25)		(3,664)
Other Comprehensive Income Loss Before Reclassifications Tax (Expense) Benefit	504		(793)		10		1,451
Other comprehensive income, before reclassifications, net of tax	(770)	[1]	1,210	[1]	(15)	[1]	(2,213)	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	(137)		0		(110)		(540)
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	55		0		44		214
Reclassification from Accumulated Other Comprehensive Income, net of tax	(82)	[1]	0	[1]	(66)	[1]	(326)	[1]
Other Comprehensive (Loss) Income	(852)	[1]	1,210	[1]	(81)	[1]	(2,539)	[1]
Amortization of Net Retirement Plan Actuarial Loss [Member]
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]	0	[1]	0	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	116		390		346		1,173
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	(46)		(155)		(137)		(466)
Reclassification from Accumulated Other Comprehensive Income, net of tax	70	[1]	235	[1]	209	[1]	707	[1]
Other Comprehensive (Loss) Income	70	[1]	235	[1]	209	[1]	707	[1]
(Accretion) Amortization of Net Retirement Plan Prior Service Credit [Member]
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]	0	[1]	0	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	(22)		1		(65)		1
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	9		0		26		0
Reclassification from Accumulated Other Comprehensive Income, net of tax	(13)	[1]	1	[1]	(39)	[1]	1	[1]
Other Comprehensive (Loss) Income	$ (13)	[1]	$ 1	[1]	$ (39)	[1]	$ 1	[1]

[1] All amounts are net of tax. Amounts in parentheses indicate debits.