Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
INTEREST INCOME
Loans, including fees	$ 160,136	$ 142,566
Investment securities:
Taxable	13,193	11,914
Tax-exempt	2,965	2,849
Dividends	5	129
Loans held for sale	216	187
Other interest income	1,172	842
Total Interest Income	177,687	158,487
INTEREST EXPENSE
Deposits	16,450	11,801
Short-term borrowings	2,041	855
Federal Home Loan Bank advances and other long-term debt	7,878	8,252
Total Interest Expense	26,369	20,908
Net Interest Income	151,318	137,579
Provision for credit losses	3,970	4,800
Net Interest Income After Provision for Credit Losses	147,348	132,779
NON-INTEREST INCOME
Other service charges and fees	11,419	12,437
Service charges on deposit accounts	11,962	12,400
Investment management and trust services	12,871	11,808
Mortgage banking income	4,193	4,596
Investment securities gains, net	19	1,106
Other	5,411	4,326
Non-interest income before investment securities gains	45,856	45,567
Total Non-Interest Income	45,875	46,673
NON-INTEREST EXPENSE
Salaries and employee benefits	75,768	69,236
Net occupancy expense	13,632	12,663
Data processing and software	10,473	8,979
Other outside services	8,124	5,546
Amortization of tax credit investments	1,637	998
Professional fees	4,816	2,737
Equipment expense	3,534	3,359
FDIC insurance expense	2,953	2,058
Taxes, Other	2,302	2,087
Marketing	2,250	1,986
Other	11,172	12,626
Total Non-Interest Expense	136,661	122,275
Income Before Income Taxes	56,562	57,177
Income taxes	7,082	13,797
Net Income	$ 49,480	$ 43,380
PER SHARE:
Net Income (Basic) (in dollars per share)	$ 0.28	$ 0.25
Net Income (Diluted) (in dollars per share)	0.28	0.25
Cash Dividends (in dollars per share)	$ 0.12	$ 0.11