Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 17,975	$ 15,148
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,507	2,411
Loss on sale of other real estate owned	356	232
Writedown of other real estate owned	474	2,675
Provision for loan losses	6,100	9,450
Deferred tax benefit	(160)	(1,394)
Stock based compensation expense	179	74
Net gain on sale of bank premises and equipment	(2)	0
Net gain on sales and calls of securities	(732)	(1,138)
Decrease (increase) in taxes receivable	(1,883)	1,542
Decrease in interest receivable	1,044	312
Decrease in interest payable	(120)	(215)
Decrease in other assets	1,583	3,799
Increase (decrease) in accrued expenses and other liabilities	635	(404)
Total adjustments	9,981	17,344
Net cash provided by operating activities	27,956	32,492
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	601,747	403,637
Proceeds from calls and maturities of held to maturity securities	57,836	37,184
Purchases of securities available for sale	(795,544)	(419,085)
Proceeds from maturities of securities available for sale	914	9,079
Purchases of held to maturity securities	(10,303)	0
Net increase in loans	(50,131)	(81,961)
Proceeds from dispositions of other real estate owned	5,579	3,117
Proceeds from dispositions of bank premises and equipment	2	0
Purchases of bank premises and equipment	(3,369)	(1,811)
Net cash used in investing activities	(193,269)	(49,840)
Cash flows from financing activities:
Net increase in deposits	162,677	98,444
Net increase in short-term borrowings	3,155	4,192
Proceeds from sale of treasury stock	1,446	1,468
Dividends paid	(12,270)	(10,130)
Net cash provided by financing activities	155,008	93,974
Net increase (decrease) in cash and cash equivalents	(10,305)	76,626
Cash and cash equivalents at beginning of period	532,943	444,250
Cash and cash equivalents at end of period	522,638	520,876
Cash paid during the year for:
Interest paid	11,464	13,910
Income taxes paid	12,461	6,722
Other non cash items:
Transfer of loans to other real estate owned	5,014	3,452
Increase in dividends payable	17	16
Change in unrealized gain on securities available for sale-gross of deferred taxes	6,718	11,673
Change in deferred tax effect on unrealized gain on securities available for sale	(2,678)	(4,654)
Amortization of net actuarial loss and prior service credit on pension and post retirement plans	63	(89)
Change in deferred tax effect of amortization of net actuarial loss and prior service credit	$ (25)	$ 35