Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Comprehensive Income
Net income	$ 4,231	$ 3,018
Other comprehensive income:
Unrealized gains and losses on securities available-for-sale: Gains arising during the period, net of tax	3,507	2,060
Unrealized gains and losses on securities available-for-sale: Reclassification adjustment on OTTI losses included in income	58	95
Unrealized gains and losses on securities available-for-sale: Reclassification adjustment for net gains arising during the period	(995)	(861)
Amortization of unrealized holding gains on securities transferred from available-for-sale to held-to-maturity securities	(10)
Net unrealized gains on investment securities	2,560	1,294
Change in minimum pension liability		(85)
Total other comprehensive income (see Note 6)	2,560	1,209
Total comprehensive income	$ 6,791	$ 4,227