Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income:
Loans, including fees	$ 166,334	$ 166,300	$ 497,840	$ 328,892
Securities-taxable	21,141	29,004	67,889	61,021
Securities-tax exempt	1,422	1,758	4,377	4,344
Federal funds sold and other short term investments	308	633	1,304	1,448
Total interest income	189,205	197,695	571,410	395,705
Interest expense:
Deposits	7,519	15,138	25,654	42,717
Short-term borrowings	1,514	1,902	4,776	5,346
Long-term debt and other interest expense	2,916	3,613	9,977	4,777
Total interest expense	11,949	20,653	40,407	52,840
Net interest income	177,256	177,042	531,003	342,865
Provision for loan losses	8,101	9,256	26,141	27,221
Net interest income after provision for loan losses	169,155	167,786	504,862	315,644
Noninterest income:
Service charges on deposit accounts	20,834	16,860	58,015	38,745
Bank card fees	7,568	11,064	24,107	20,542
Trust fees	7,743	7,215	24,464	16,507
Insurance commissions and fees	4,045	4,356	12,103	12,234
Investment and annuity fees	4,269	4,642	13,291	11,042
ATM fees	4,302	4,127	13,479	10,148
Secondary mortgage market operations	4,311	3,477	11,328	6,921
Accretion of indemnification asset		5,030	5,000	13,524
Other income	9,770	8,166	26,101	16,171
Securities gains (losses), net	917	16	929	(71)
Total noninterest income	63,759	64,953	188,817	145,763
Noninterest expense:
Compensation expense	76,173	77,355	223,945	153,734
Employee benefits	17,202	17,489	54,881	36,480
Salaries and employee benefits	93,375	94,844	278,826	190,214
Net occupancy expense	13,358	14,029	41,784	28,700
Equipment expense	5,212	5,362	19,046	11,877
Data processing expense	11,005	15,664	39,523	27,915
Professional services expense	9,447	19,915	49,207	48,061
Telecommunications and postage	5,313	5,837	17,068	12,239
Advertising	2,243	3,852	12,263	8,028
Deposit insurance and regulatory fees	3,833	2,961	11,128	9,305
Amortization of intangibles	8,110	7,097	24,336	9,332
Other expense	17,818	24,458	61,968	42,733
Total noninterest expense	169,714	194,019	555,149	388,404
Income before income taxes	63,200	38,720	138,530	73,003
Income taxes	16,216	8,342	33,747	15,210
Net income	$ 46,984	$ 30,378	$ 104,783	$ 57,793
Basic earnings per common share	$ 0.55	$ 0.36	$ 1.23	$ 0.97
Diluted earnings per common share	$ 0.55	$ 0.36	$ 1.22	$ 0.97
Dividends paid per share	$ 0.24	$ 0.24	$ 0.72	$ 0.72
Weighted avg. shares outstanding-basic	84,777	84,699	84,757	59,149
Weighted avg. shares outstanding-diluted	85,632	84,985	85,525	59,442