CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 17,767	$ 16,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	6,418	6,389
Amortization of tax credits	489	682
Deferred income tax expense	5,226	1,687
Amortization of intangibles	0	358
Provision (benefit) for credit losses	(996)	6,634
Decrease (increase) in accrued interest receivable	221	(541)
Increase in other assets	(2,782)	(3,388)
Loss on impairment of securities	49	179
Gains on sales of securities	(375)	(521)
Net loss on disposal of premises and equipment	41	305
Net other real estate owned valuation adjustments and (loss) gain on sales	2,061	1,255
Gains on sales of loans held for sale	(1,949)	(1,035)
Origination of loans held for sale	(9,510)	(27,474)
Proceeds from sales of loans held for sale	14,248	29,610
Decrease in interest payable	(45)	(2,085)
Increase in other liabilities	1,430	1,363
Increase in cash surrender value of bank owned life insurance	(667)	(653)
Stock based compensation expense	1,168	1,452
Excess tax benefits associated with stock plans	(124)	(53)
Net cash provided by operating activities	33,162	30,179
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of available for sale securities	183,705	198,778
Proceeds from sales of available for sale securities	32,859	39,193
Proceeds from redemption of FHLB stock	108	0
Purchase of available for sale securities	(276,585)	(406,429)
Loans made to customers less than principal collected on loans	11,499	10,204
Purchase of loans	(8,255)	0
Proceeds from the sale of other real estate owned	11,424	20,392
Capital expenditures on other real estate owned	(69)	(521)
Capital expenditures on premises and equipment	(772)	(1,845)
Net cash used by investing activities	(46,086)	(140,228)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand, savings and interest bearing transaction accounts	51,566	138,705
Net decrease in time deposits	(37,204)	(88,449)
Proceeds from issuance of short-term borrowings	97,000	55,818
Repayment of short-term borrowings	(97,000)	(67,200)
Proceeds from issuance of long-term borrowings	7,900	50,000
Repayment of long-term borrowings	0	(49,118)
Proceeds from issuance of common stock-stock options	92	74
Fractional share payment	0	(18)
Redemption of stock pursuant to stock plans	(499)	(509)
Excess tax benefits associated with stock plans	124	53
Activity in deferred compensation plan	53	(20)
Net cash provided by financing activities	22,032	39,336
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	9,108	(70,713)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	92,227	177,991
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 101,335	$ 107,278