Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 5,263	$ 3,862
Before Tax Amount
Net income	6,209	4,688
Net unrealized (losses) gains on available-for-sale investment securities:
Net unrealized holding (losses) gains arising during the period	(900)	1,157
Less: reclassification adjustment for net gains on sales realized in net income	(258)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	3	7
Total net unrealized (losses) gains on available-for-sale investment securities	(1,155)	1,164
Net change in fair value of derivatives used for cash flow hedges	174	229
Defined benefit pension plans:
Amortization of net loss included in net periodic pension costs	297	205
Accretion of prior service cost included in net periodic pension costs	(64)	(64)
Total defined benefit pension plans	233	141
Other comprehensive (loss) income	(748)	1,534
Total comprehensive income	5,461	6,222
Tax Expense (Benefit)
Net income	946	826
Net unrealized (losses) gains on available-for-sale investment securities:
Net unrealized holding (losses) gains arising during the period	(315)	405
Less: reclassification adjustment for net gains on sales realized in net income	(90)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	1	2
Total net unrealized (losses) gains on available-for-sale investment securities	(404)	407
Net change in fair value of derivatives used for cash flow hedges	61	80
Defined benefit pension plans:
Amortization of net loss included in net periodic pension costs	104	72
Accretion of prior service cost included in net periodic pension costs	(23)	(23)
Total defined benefit pension plans	81	49
Other comprehensive (loss) income	(262)	536
Total comprehensive income	684	1,362
Net Of Tax Amount.
Net income	5,263	3,862
Net unrealized (losses) gains on available-for-sale investment securities:
Net unrealized holding (losses) gains arising during the period	(585)	752
Less: reclassification adjustment for net gains on sales realized in net income	(168)
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income	2	5
Total net unrealized (losses) gains on available-for-sale investment securities	(751)	757
Net change in fair value of derivatives used for cash flow hedges	113	149
Defined benefit pension plans:
Amortization of net loss included in net periodic pension costs	193	133
Accretion of prior service cost included in net periodic pension costs	(41)	(41)
Total defined benefit pension plans	152	92
Other comprehensive (loss) income	(486)	998
Total comprehensive income	$ 4,777	$ 4,860