Comprehensive Income (Loss) (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
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, before tax					$ 6,570		$ (8,833)
Less reclassification adjustment for gains realized in net income, before tax					330		69
Unrealized gains on investment securities, before tax					6,240		(8,902)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization, before tax					(85)		(429)
Other comprehensive income net, before tax					6,325		(8,473)
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, tax					2,101		(3,128)
Less reclassification adjustment for gains realized in net income, tax					112		23
Unrealized gains on investment securities, tax					1,989		(3,151)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization, tax					(29)		(146)
Other comprehensive income net, tax					2,018		(3,005)
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, net of tax	(80)		(1,687)		4,469		(5,705)
Less reclassification adjustment for gains realized in net income (loss) (1)	157	[1]			218	[1]	46	[1]
Unrealized gains (losses) on investment securities	(237)		(1,687)		4,251		(5,751)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization (2), net of tax effect	(18)	[2]	(94)	[2]	(56)	[2]	(283)	[2]
Other comprehensive income (loss)	$ (219)		$ (1,593)		$ 4,307		$ (5,468)

[1] Amounts are included in net gains on the sale of AFS investment securities on the Consolidated Statements of Operations in total non-interest income, net of taxes.

[2] Amounts are included in salaries and benefits on the Consolidated Statements of Operations in non-interest expense.