Comprehensive Income Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	$ 514	[1]	$ (3,643)	[1]	$ 755	[1]	$ (3,423)	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	72	[1]	228	[1]	129	[1]	146	[1]
Other Comprehensive Income (Loss), before Tax	970		(5,655)		1,463		(5,424)
Other Comprehensive Income (Loss), Tax	(384)		2,240		(579)		2,147
Other Comprehensive (Loss) Income	586	[1]	(3,415)	[1]	884	[1]	(3,277)	[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	850		(6,034)		1,249		(5,667)
Other Comprehensive Income Loss Before Reclassifications Tax (Expense) Benefit	(336)		2,391		(494)		2,244
Other comprehensive income, before reclassifications, net of tax	514	[1]	(3,643)	[1]	755	[1]	(3,423)	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	27		(13)		27		(540)
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	(11)		5		(11)		214
Reclassification from Accumulated Other Comprehensive Income, net of tax	16	[1]	(8)	[1]	16	[1]	(326)	[1]
Other Comprehensive (Loss) Income	530	[1]	(3,651)	[1]	771	[1]	(3,749)	[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	114		392		230		783
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	(45)		(156)		(91)		(311)
Reclassification from Accumulated Other Comprehensive Income, net of tax	69	[1]	236	[1]	139	[1]	472	[1]
Other Comprehensive (Loss) Income	69	[1]	236	[1]	139	[1]	472	[1]
Accretion 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	(21)				(43)
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	8				17
Reclassification from Accumulated Other Comprehensive Income, net of tax	(13)	[1]	0	[1]	(26)	[1]	0	[1]
Other Comprehensive (Loss) Income	$ (13)	[1]	$ 0	[1]	$ (26)	[1]	$ 0	[1]

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