Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 28,008	$ 23,788	$ 6,374
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,546	8,366	9,036
Provision for loan and lease losses	29,365	32,508	39,377
Net amortization of premium on securities	14,939	7,380	2,492
Provision for deferred taxes	4,363	(2,736)	(2,599)
Securities gains, net	(13,104)	(6,834)	(8,648)
(Increase) decrease in trading account securities	(89)	451	795
Loss on impairment of equity securities	0	0	40
Stock based compensation	1,278	926	953
Loans originated for sale	(479,221)	(639,381)	(805,250)
Proceeds on sales of loans	460,963	654,063	808,949
Net gains on sales of loans	(11,366)	(8,088)	(6,084)
(increase) decrease in accrued interest receivable	1,397	1,097	(933)
(Increase) decrease in prepaid expenses	2,969	2,459	(17,979)
Decrease in accrued interest payable	(701)	(1,056)	(2,564)
Goodwill impairment charge	0	1,639	12,659
Valuation adjustment on mortgage servicing rights	19	0	0
Gain on acquisition	0	0	(1,296)
Other, net	5,039	5,856	4,559
NET CASH PROVIDED BY OPERATING ACTIVITIES	51,405	80,438	39,881
Net cash and cash equivalents received in acquisition, net of cash paid		0	7,193
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	493,167	399,901	198,086
Proceeds from the sale of securities held to maturity	0	0	1,659
Proceeds from the maturity of and principal paydowns on securities available for sale	295,137	252,514	234,640
Proceeds from the maturity of and principal paydowns on securities held to maturity	1,461	1,913	2,592
Purchase of securities available for sale	(788,543)	(715,164)	(670,493)
Purchase of securities held to maturity	0	(23,419)	(12,895)
Net increase in loans and leases	(207,027)	(75,583)	8,156
Purchase of bank owned life insurance policies	(3,140)	(5,676)	0
Capital expenditures	(6,719)	(9,605)	(6,596)
Proceeds on sale of OREO and other repossessed assets	22,771	16,001	17,871
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	(192,893)	(159,118)	(219,787)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits and savings accounts	275,890	124,584	475,702
Net decrease in time deposit accounts	(99,825)	(140,925)	(115,192)
Net increase (decrease) in short-term borrowings	34,217	73,515	(53,663)
Proceeds from other borrowings	18,565	25,075	55,552
Repayments of other borrowings	(8,272)	(113,977)	(41,956)
Issuance of Series C preferred stock	81,698	0	0
Redemption of preferred stock	(81,698)	0	0
Redemption of warrant	(1,800)	0	0
Purchase of treasury stock	(389)	(212)	(236)
Proceeds from issuance of common stock	1,428	1,360	970
Income tax benefits on exercised stock options	108	28	18
Dividends paid	(11,172)	(10,606)	(10,182)
NET CASH USED BY FINANCING ACTIVITIES	208,750	(41,158)	311,013
Net increase (decrease) in cash and cash equivalents	67,262	(119,838)	131,107
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	62,572	182,410	51,303
CASH AND CASH EQUIVALENTS AT END OF PERIOD	129,834	62,572	182,410
Supplemental disclosures:
Cash paid for income/franchise taxes	7,133	13,676	7,269
Cash paid for interest	47,044	56,936	73,094
Loans transferred to OREO and other repossessed assets	41,933	28,947	43,231
Purchases of available for sale securites, accrued, not paid	$ 55,349	$ 0	$ 0