Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Loans, including fees	$ 175,068	$ 155,152	$ 503,029	$ 446,158
Investment securities:
Taxable	13,956	11,423	41,034	34,811
Tax-exempt	3,035	2,920	8,933	8,625
Dividends	0	105	5	343
Loans held for sale	388	243	888	631
Other interest income	1,601	1,667	4,016	3,311
Total Interest Income	194,048	171,510	557,905	493,879
INTEREST EXPENSE
Deposits	23,819	16,023	59,553	40,709
Short-term borrowings	2,002	578	7,079	2,407
Federal Home Loan Bank advances and other long-term debt	8,100	8,100	23,761	24,812
Total Interest Expense	33,921	24,701	90,393	67,928
Net Interest Income	160,127	146,809	467,512	425,951
Provision for credit losses	1,620	5,075	38,707	16,575
Net Interest Income After Provision for Credit Losses	158,507	141,734	428,805	409,376
NON-INTEREST INCOME
Non-interest income before investment securities gains	51,019	47,377	145,965	143,879
Investment securities gains, net	14	4,597	37	7,139
Total Non-Interest Income	51,033	51,974	146,002	151,018
NON-INTEREST EXPENSE
Salaries and employee benefits	76,770	72,894	227,457	216,626
Net occupancy expense	12,578	12,180	38,970	37,159
Data processing and software	10,157	10,301	31,083	28,334
Other outside services	9,122	6,582	24,814	19,836
Amortization of tax credit investments	1,637	3,503	4,911	7,652
Professional fees	3,427	3,388	10,615	9,056
Equipment expense	3,000	3,298	9,968	9,691
FDIC insurance expense	2,814	3,007	8,430	7,431
Taxes, Other	2,707	2,830	7,463	7,730
Marketing	2,692	2,089	7,277	6,309
Other	10,509	12,085	34,431	37,303
Total Non-Interest Expense	135,413	132,157	405,419	387,127
Income Before Income Taxes	74,127	61,551	169,388	173,267
Income taxes	8,494	12,646	19,078	35,515
Net Income	$ 65,633	$ 48,905	$ 150,310	$ 137,752
PER SHARE:
Net Income (Basic) (in dollars per share)	$ 0.37	$ 0.28	$ 0.86	$ 0.79
Net Income (Diluted) (in dollars per share)	0.37	0.28	0.85	0.78
Cash Dividends (in dollars per share)	$ 0.12	$ 0.11	$ 0.36	$ 0.33
Investment management and trust services
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 13,066	$ 12,157	$ 38,740	$ 36,097
Other service charges and fees
NON-INTEREST INCOME
Non-interest income before investment securities gains	15,433	12,251	40,517	39,030
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income before investment securities gains	12,259	13,022	36,491	38,336
Mortgage banking income
NON-INTEREST INCOME
Non-interest income before investment securities gains	4,896	4,805	14,252	15,542
Other
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 5,365	$ 5,142	$ 15,965	$ 14,874