Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 1,130	$ 29,181	$ (2,137)
Other-than-temporarily impaired securities available for sale:
Total gains (losses)	6,331	739	(1,256)
Losses recognized in earnings	1,240	528	368
Gains (losses) recognized in comprehensive income	7,571	1,267	(888)
Income tax effect	(3,104)	(519)	364
Unrealized holding gains (losses) on other-than-temporarily impaired securities available for sale, net of tax	4,467	748	(524)
Securities available for sale not other-than-temporarily impaired:
(Losses) gains arising during the year	(16,985)	(4,754)	2,348
Income tax effect	6,566	1,706	(715)
Securities available for sale not other-than-temporarily impaired, net of tax	(10,419)	(3,048)	1,633
Gains recognized in earnings			(21)
Income tax effect			8
Total securities available for sale not other-than-temporarily impaired			(13)
Unrealized holding (losses) gains on securities available for sale not other-than-temporarily-impaired, net of tax	(10,419)	(3,048)	1,620
Unrealized holding (losses) gains on securities, net	(5,952)	(2,300)	1,096
Accrued benefit liability adjustment:
Net gain (loss) during the year	(33)	(895)	(819)
Reclassification adjustment for amortization of prior service cost and net gain/loss included in net period pension cost	750	438	324
Income tax effect	(287)	182	198
Net of tax	430	(275)	(297)
Other comprehensive (loss) income	(5,522)	(2,575)	799
Comprehensive (Loss) Income	$ (4,392)	$ 26,606	$ (1,338)