Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest Income
Interest and fees on LHFS & LHFI	$ 299,645	$ 274,433	$ 263,582
Interest and fees on acquired loans	30,144	51,152	76,736
Interest on securities:
Taxable	77,614	80,730	80,148
Tax exempt	3,675	4,323	4,869
Interest on federal funds sold and securities purchased under reverse repurchase agreements	14	8	23
Other interest income	988	1,579	1,524
Total Interest Income	412,080	412,225	426,882
Interest Expense
Interest on deposits	12,748	12,598	15,323
Interest on federal funds purchased and securities sold under repurchase agreements	1,717	801	550
Other interest expense	10,082	7,061	5,673
Total Interest Expense	24,547	20,460	21,546
Net Interest Income	387,533	391,765	405,336
Provision for loan losses, LHFI	10,957	8,375	1,211
Provision for loan losses, acquired loans	3,757	3,425	6,171
Net Interest Income After Provision for Loan Losses	372,819	379,965	397,954
Noninterest Income
Service charges on deposit accounts	45,253	47,366	48,671
Bank card and other fees	27,906	28,298	32,966
Mortgage banking, net	28,212	30,176	24,780
Insurance commissions	36,764	36,424	33,468
Wealth management	30,492	31,369	32,343
Other, net	5,626	(484)	614
Securities (losses) gains, net	(310)	0	300
Total Noninterest Income	173,943	173,149	173,142
Noninterest Expense
Salaries and employee benefits	239,637	230,198	226,694
Services and fees	58,695	57,534	56,598
Net occupancy - premises	24,982	25,318	26,468
Equipment expense	24,225	23,859	23,860
Other real estate expense	586	4,903	11,321
FDIC assessment expense	11,243	10,728	10,197
Other expense	47,930	49,122	53,867
Total Noninterest Expense	407,298	401,662	409,005
Income Before Income Taxes	139,464	151,452	162,091
Income taxes	31,053	35,414	38,529
Net Income	$ 108,411	$ 116,038	$ 123,562
Earnings Per Share
Basic	$ 1.60	$ 1.72	$ 1.83
Diluted	$ 1.60	$ 1.71	$ 1.83