Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Comprehensive Income [Abstract]
Net income	$ 4,353	$ 3,584	$ 8,584	$ 6,602
Other comprehensive income:
Unrealized gains and losses on securities available-for-sale: Unrealized holding gains arising during the period	2,721	2,855	5,909	4,637
Unrealized gains and losses on securities available-for-sale: Reclassification adjustment on OTTI losses included in income	93	92	131	153
Unrealized gains and losses on securities available-for-sale: Reclassification adjustment for net gains arising during the period	(432)	(613)	(1,092)	(1,162)
Unrealized gains and losses on securities available-for-sale: Unrealized holding gains on securities transferred from available-for-sale to held-to-maturity securities		205		205
Unrealized gains and losses on securities available-for-sale: Amortization of unrealized holding gains on securities transferred from available-for-sale to held-to-maturity securities	10	2	4	2
Unrealized gains and losses on securities available-for-sale: Net unrealized gains on investment securities	2,392	2,541	4,952	3,835
Change in minimum pension liability, Net of tax amount				85
Total other comprehensive income	2,392	2,541	4,952	3,750
Total comprehensive income	$ 6,745	$ 6,125	$ 13,536	$ 10,352