Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 4,763	$ 4,516	$ 10,026	$ 8,378
Before Tax Amount
Net income	6,168	5,715	12,377	10,403
Net unrealized gains on available-for-sale investment securities:
Net unrealized holding gains arising during the period	1,417	5,161	517	6,318
Less: reclassification adjustment for net gains on sales realized in net income	(24)	(569)	(282)	(569)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	6	3	9	10
Total net unrealized gains on available-for-sale investment securities	1,399	4,595	244	5,759
Net change in fair value of derivatives used for cash flow hedges	(563)	(601)	(389)	(372)
Defined benefit pension plans:
Less: amortization of net loss included in net periodic pension costs	292	176	589	381
Less: accretion of prior service cost included in net periodic pension costs	(64)	(63)	(128)	(127)
Total defined benefit pension plans	228	113	461	254
Other comprehensive income	1,064	4,107	316	5,641
Total comprehensive income	7,232	9,822	12,693	16,044
Tax Expense (Benefit)
Net income	1,405	1,199	2,351	2,025
Net unrealized gains on available-for-sale investment securities:
Net unrealized holding gains arising during the period	496	1,806	181	2,211
Less: reclassification adjustment for net gains on sales realized in net income	(9)	(199)	(99)	(199)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	2	1	3	3
Total net unrealized gains on available-for-sale investment securities	489	1,608	85	2,015
Net change in fair value of derivatives used for cash flow hedges	(197)	(210)	(136)	(130)
Defined benefit pension plans:
Less: amortization of net loss included in net periodic pension costs	102	61	206	133
Less: accretion of prior service cost included in net periodic pension costs	(22)	(21)	(45)	(44)
Total defined benefit pension plans	80	40	161	89
Other comprehensive income	372	1,438	110	1,974
Total comprehensive income	1,777	2,637	2,461	3,999
Net of Tax Amount
Net income	4,763	4,516	10,026	8,378
Net unrealized gains on available-for-sale investment securities:
Net unrealized holding gains arising during the period	921	3,355	336	4,107
Less: reclassification adjustment for net gains on sales realized in net income	(15)	(370)	(183)	(370)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	4	2	6	7
Total net unrealized gains on available-for-sale investment securities	910	2,987	159	3,744
Net change in fair value of derivatives used for cash flow hedges	(366)	(391)	(253)	(242)
Defined benefit pension plans:
Less: amortization of net loss included in net periodic pension costs	190	115	383	248
Less: accretion of prior service cost included in net periodic pension costs	(42)	(42)	(83)	(83)
Total defined benefit pension plans	148	73	300	165
Other comprehensive income	692	2,669	206	3,667
Total comprehensive income	$ 5,455	$ 7,185	$ 10,232	$ 12,045