Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Loans including fees:
Taxable	$ 61,307	$ 60,916	$ 188,748	$ 185,957
Nontaxable	2,448	2,192	7,007	6,639
Investment securities, available-for-sale:
Taxable	9,182	10,810	31,394	33,470
Nontaxable	4,990	3,997	14,473	11,482
Investment securities, held-to-maturity, taxable	5,959	4,839	14,028	14,708
Money market and other interest-earning investments	8	18	28	43
Total interest income	83,894	82,772	255,678	252,299
Interest Expense
Deposits	4,390	6,419	14,674	21,145
Short-term borrowings	95	124	575	369
Other borrowings	1,413	2,079	4,192	6,389
Total interest expense	5,898	8,622	19,441	27,903
Net interest income	77,996	74,150	236,237	224,396
Provision for loan losses	(1,724)	400	(4,572)	2,849
Net interest income after provision for loan losses	79,720	73,750	240,809	221,547
Noninterest Income
Wealth management fees	5,534	5,198	17,602	16,138
Service charges on deposit accounts	13,929	12,816	36,793	38,582
ATM fees	6,246	5,692	17,986	17,920
Mortgage banking revenue	957	840	3,823	2,172
Insurance premiums and commissions	8,853	8,670	29,114	27,595
Investment product fees	4,474	3,359	12,131	9,453
Company-owned life insurance	2,713	1,734	5,971	4,741
Net securities gains	186	2,877	2,994	10,488
Total other-than-temporary impairment losses		(202)		(1,078)
Loss recognized in other comprehensive income
Impairment losses recognized in earnings		(202)	0	(1,078)
Gain (loss) on derivatives	24	226	156	657
Gain on sale leaseback transactions	1,566	1,607	4,941	4,820
Gain on branch divestitures-deposit premium			2,244
Change in FDIC indemnification asset	(2,140)	(4,877)	(5,916)	(4,118)
Other income	5,413	2,927	12,475	11,172
Total noninterest income	47,755	40,867	140,314	138,542
Noninterest Expense
Salaries and employee benefits	51,777	49,876	151,460	142,673
Occupancy	12,584	13,454	36,697	39,170
Equipment	3,306	2,902	8,979	8,725
Marketing	2,201	1,537	5,340	4,474
Data processing	5,704	5,432	16,595	16,835
Communication	2,655	2,627	7,924	8,053
Professional fees	3,140	3,787	9,643	9,141
Loan expense	1,886	1,760	5,471	4,896
Supplies	666	739	1,884	2,106
FDIC assessment	1,857	1,320	3,627	4,094
Other real estate owned expense	1,465	371	4,016	11,754
Amortization of intangibles	1,859	1,956	6,224	5,888
Other expense	7,558	3,258	15,897	8,524
Total noninterest expense	96,658	89,019	273,757	266,333
Income before income taxes	30,817	25,598	107,366	93,756
Income tax expense	6,869	5,861	30,995	25,090
Net income	$ 23,948	$ 19,737	$ 76,371	$ 68,666
Net income per common share-basic	$ 0.24	$ 0.20	$ 0.76	$ 0.72
Net income per common share-diluted	$ 0.23	$ 0.20	$ 0.75	$ 0.72
Weighted average number of common shares outstanding-basic	100,645	95,690	100,901	94,886
Weighted average number of common shares outstanding-diluted	101,131	96,125	101,351	95,274
Dividends per common share	$ 0.10	$ 0.09	$ 0.30	$ 0.27