Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 27,728	$ 24,373
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,776	3,605
Loss on sale of other real estate owned	577	304
Writedown of other real estate owned	809	2,890
Provision for loan losses	9,000	14,550
Deferred tax benefit	(18)	(1,942)
Stock based compensation expense	268	111
Net gain on sale of bank premises and equipment	(2)	0
Net gain on sales and calls of securities	(1,398)	(1,296)
Decrease in taxes receivable	1,530	4,618
Decrease in interest receivable	1,249	323
Decrease in interest payable	(295)	(303)
Decrease in other assets	1,680	4,581
Increase in due to broker	0	10,000
Increase in accrued expenses and other liabilities	1,030	150
Total adjustments	18,206	37,591
Net cash provided by operating activities	45,934	61,964
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	906,211	916,106
Proceeds from calls and maturities of held to maturity securities	70,640	68,489
Purchases of securities available for sale	(1,039,173)	(1,019,583)
Proceeds from maturities of securities available for sale	2,416	13,185
Purchases of held to maturity securities	(10,303)	(70,935)
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(628)	0
Proceeds from sales of Federal Reserve Bank and Federal Home Loan Bank stock	0	53
Net increase in loans	(107,552)	(141,166)
Proceeds from dispositions of other real estate owned	7,749	6,914
Proceeds from dispositions of bank premises and equipment	2	0
Purchases of bank premises and equipment	(4,021)	(2,919)
Net cash used in investing activities	(174,659)	(229,856)
Cash flows from financing activities:
Net increase in deposits	40,480	126,440
Net increase in short-term borrowings	14,188	18,466
Proceeds from sale of treasury stock	2,176	2,190
Proceeds from common stock offering	0	67,578
Dividends paid	(18,418)	(15,207)
Net cash provided by financing activities	38,426	199,467
Net increase (decrease) in cash and cash equivalents	(90,299)	31,575
Cash and cash equivalents at beginning of period	532,943	444,250
Cash and cash equivalents at end of period	442,644	475,825
Cash paid during the year for:
Interest paid	16,238	20,470
Income taxes paid	15,127	8,805
Other non cash items:
Transfer of loans to other real estate owned	12,561	8,803
Increase in dividends payable	25	1,052
Change in unrealized gain on securities available for sale-gross of deferred taxes	12,166	7,413
Change in deferred tax effect on unrealized gain on securities available for sale	(4,851)	(2,956)
Amortization of net actuarial loss and prior service credit on pension and post retirement plans	96	(133)
Change in deferred tax effect of amortization of net actuarial loss and prior service credit	$ (39)	$ 53