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	$ 8,713	$ 7,565	$ 17,151	$ 14,365
Securities available for sale:
Unrealized (losses) gains on securities arising during the period	(601)	3,537	(458)	3,626
Less: reclassification adjustment for net gains on securities realized in net income	192	145	138	92
Net unrealized (losses) gains on securities available for sale, net of tax	(793)	3,392	(596)	3,534
Reclassification adjustment for change in non-credit portion of OTTI realized losses transferred to net income	0	0	80	(13)
Cash flow hedges:
Unrealized losses on cash flow hedges arising during the period	(128)	(468)	(204)	(419)
Less: reclassification adjustment for amount of gains on cash flow hedges realized in net income	112	122	223	245
Net unrealized (losses) gains on cash flow hedges, net of tax	(16)	(346)	19	(174)
Defined benefit plan obligation adjustment	171	60	356	120
Total other comprehensive (loss) income, net of tax	(638)	3,106	(141)	3,467
Total comprehensive income	$ 8,075	$ 10,671	$ 17,010	$ 17,832