Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period			$ (310)	$ 688
Non-credit loss portion of other-than-temporary impairments				(121)
Less adjustment for impaired investments			(859)	(381)
Less reclassification adjustment for gains realized in net loss			159	1,101
Unrealized gains on investment securities			390	(153)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization			(176)	(116)
Other comprehensive income, net			566	(37)
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period			(81)	183
Non-credit loss portion of other-than-temporary impairments				(42)
Less adjustment for impaired investments			(301)	(133)
Less reclassification adjustment for gains realized in net loss			56	385
Unrealized gains on investment securities			164	(111)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization			(62)	(41)
Other comprehensive income, net			226	(70)
Unrealized gains on investment securities [Abstract]
Unrealized holding gains (losses) arising during period	(593)	1,008	(229)	505
Non-credit loss portion of other-than-temporary impairments	0	(79)	0	(79)
Less adjustment for impaired investments	(558)	(248)	(558)	(248)
Less reclassification adjustment for gains realized in net loss	13	711	103	716
Unrealized gains (losses) on investment securities			226	(42)
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization	(63)	(39)	(114)	(75)
Other comprehensive income	$ 15	$ 505	$ 340	$ 33