Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Loans including fees:
Taxable	$ 62,911	$ 52,047	$ 125,041	$ 102,352
Nontaxable	2,228	2,335	4,447	4,657
Investment securities, available-for-sale:
Taxable	11,316	12,875	22,660	26,533
Nontaxable	3,905	3,320	7,485	6,841
Investment securities, held-to-maturity, taxable	4,894	6,140	9,869	12,552
Money market and other interest-earning investments	10	155	25	254
Total interest income	85,264	76,872	169,527	153,189
Interest Expense
Deposits	7,044	9,585	14,726	19,588
Short-term borrowings	118	114	245	258
Other borrowings	2,129	4,854	4,310	9,657
Total interest expense	9,291	14,553	19,281	29,503
Net interest income	75,973	62,319	150,246	123,686
Provision for loan losses	393	3,207	2,449	6,519
Net interest income after provision for loan losses	75,580	59,112	147,797	117,167
Noninterest Income
Wealth management fees	5,844	5,327	10,940	10,427
Service charges on deposit accounts	12,904	12,464	25,766	24,014
ATM fees	5,895	6,079	12,228	11,970
Mortgage banking revenue	773	909	1,332	1,861
Insurance premiums and commissions	9,311	9,011	18,925	19,581
Investment product fees	3,163	2,933	6,094	5,527
Company-owned life insurance	1,512	1,298	3,007	2,470
Net securities gains	6,992	666	7,611	2,165
Total other-than-temporary impairment losses	(780)	(1,433)	(876)	(1,732)
Loss recognized in other comprehensive income	0	1,233	0	1,233
Impairment losses recognized in earnings	(780)	(200)	(876)	(499)
Gain on derivatives	249	221	431	553
Gain on sale leaseback transactions	1,606	1,637	3,213	3,273
Change in FDIC indemnification asset	(4,005)	0	759	0
Other income	5,078	3,244	8,245	5,068
Total noninterest income	48,542	43,589	97,675	86,410
Noninterest Expense
Salaries and employee benefits	46,751	43,084	92,797	87,605
Occupancy	13,256	12,196	25,716	24,498
Equipment	2,967	2,845	5,823	5,842
Marketing	1,495	1,582	2,937	2,899
Data processing	5,934	5,770	11,403	11,835
Communication	2,602	2,644	5,426	4,978
Professional fees	2,630	2,134	5,354	4,557
Loan expense	1,528	1,125	3,136	2,212
Supplies	609	932	1,367	1,545
FDIC assessment	1,379	1,773	2,774	3,964
Other real estate owned expense	1,576	764	11,383	1,102
Amortization of intangibles	1,911	1,838	3,932	3,762
Other expense	3,389	3,071	5,266	4,884
Total noninterest expense	86,027	79,758	177,314	159,683
Income before income taxes	38,095	22,943	68,158	43,894
Income tax expense	10,889	5,927	19,229	10,445
Net income	$ 27,206	$ 17,016	$ 48,929	$ 33,449
Net income per common share - basic	$ 0.29	$ 0.18	$ 0.52	$ 0.35
Net income per common share - diluted	$ 0.29	$ 0.18	$ 0.52	$ 0.35
Weighted average number of common shares outstanding-basic	94,514	94,479	94,479	94,456
Weighted average number of common shares outstanding-diluted	94,871	94,701	94,847	94,674
Dividends per common share	$ 0.09	$ 0.07	$ 0.18	$ 0.14