Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Income
Interest and fees on LHFI & LHFS	$ 64,706	$ 70,268	$ 129,169	$ 143,127
Interest and fees on acquired loans	20,987	5,097	33,769	8,034
Interest on securities:
Taxable	18,547	17,352	35,086	35,736
Tax exempt	1,283	1,356	2,595	2,722
Interest on federal funds sold and securities purchased under reverse repurchase agreements	5	5	9	11
Other interest income	372	336	727	666
Total Interest Income	105,900	94,414	201,355	190,296
Interest Expense
Interest on deposits	5,071	6,465	9,980	13,818
Interest on federal funds purchased and securities sold under repurchase agreements	88	142	169	313
Other interest expense	1,513	1,359	3,003	2,773
Total Interest Expense	6,672	7,966	13,152	16,904
Net Interest Income	99,228	86,448	188,203	173,392
Provision for loan losses, LHFI	(4,846)	650	(7,814)	3,943
Provision for loan losses, acquired loans	(1,552)	1,672	(1,422)	1,478
Net Interest Income After Provision for Loan Losses	105,626	84,126	197,439	167,971
Noninterest Income
Service charges on deposit accounts	12,929	12,614	24,610	24,825
Bank card and other fees	9,507	8,179	17,452	15,543
Mortgage banking, net	8,295	11,184	19,878	18,479
Insurance commissions	8,014	7,179	15,256	13,785
Wealth management	6,940	5,762	13,815	11,263
Other, net	(2,145)	(1,150)	(3,336)	2,608
Security gains (losses), net	174	(8)	378	1,042
Total Noninterest Income	43,714	43,760	88,053	87,545
Noninterest Expense
Salaries and employee benefits	55,405	46,959	108,997	93,391
Services and fees	12,816	11,750	25,848	22,497
Net occupancy - premises	6,703	4,954	12,658	9,892
Equipment expense	6,193	5,183	11,867	10,095
ORE/Foreclosure expense	5,131	2,388	8,951	6,290
FDIC assessment expense	2,376	1,826	4,397	3,601
Other expense	18,571	14,899	36,622	27,967
Total Noninterest Expense	107,195	87,959	209,340	173,733
Income Before Income Taxes	42,145	39,927	76,152	81,783
Income taxes	11,024	10,578	20,165	22,114
Net Income	$ 31,121	$ 29,349	$ 55,987	$ 59,669
Earnings Per Common Share
Basic (in dollars per share)	$ 0.46	$ 0.45	$ 0.84	$ 0.92
Diluted (in dollars per share)	$ 0.46	$ 0.45	$ 0.84	$ 0.92
Dividends Per Common Share (in dollars per share)	$ 0.23	$ 0.23	$ 0.46	$ 0.46