Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Income
Interest and fees on LHFI & LHFS	$ 258,550	$ 279,796	$ 299,816
Interest and fees on acquired loans	76,336	18,122	9,424
Interest on securities:
Taxable	72,818	66,950	75,843
Tax exempt	5,145	5,423	5,545
Interest on federal funds sold and securities purchased under reverse repurchase agreements	31	26	30
Other interest income	1,466	1,342	1,321
Total Interest Income	414,346	371,659	391,979
Interest Expense
Interest on deposits	19,718	24,604	36,294
Interest on federal funds purchased and securities sold under repurchase agreements	379	588	965
Other interest expense	5,762	5,477	5,777
Total Interest Expense	25,859	30,669	43,036
Net Interest Income	388,487	340,990	348,943
Provision for loan losses, LHFI	(13,421)	6,766	29,704
Provision for loan losses, acquired loans	6,039	5,528	624
Net Interest Income After Provision for Loan Losses	395,869	328,696	318,615
Noninterest Income
Service charges on deposit accounts	51,576	50,351	51,707
Bank card and other fees	35,961	30,445	27,474
Mortgage banking, net	33,504	40,960	26,812
Insurance commissions	30,826	28,205	26,966
Wealth management	29,480	23,056	22,962
Other, net	(7,973)	1,113	3,853
Securities gains, net	485	1,059	80
Total Noninterest Income	173,859	175,189	159,854
Noninterest Expense
Salaries and employee benefits	221,727	190,519	178,556
Services and fees	53,904	46,751	43,858
Net occupancy - premises	25,961	20,267	20,254
Equipment expense	24,538	20,478	20,177
ORE/Foreclosure expense	15,039	11,165	16,293
FDIC assessment expense	9,001	6,502	7,984
Other expense	65,561	48,820	42,728
Total Noninterest Expense	415,731	344,502	329,850
Income Before Income Taxes	153,997	159,383	148,619
Income taxes	36,937	42,100	41,778
Net Income	$ 117,060	$ 117,283	$ 106,841
Earnings Per Common Share
Basic (in dollars per share)	$ 1.75	$ 1.81	$ 1.67
Diluted (in dollars per share)	$ 1.75	$ 1.81	$ 1.66