Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME
Loans, including fees	$ 167,825	$ 148,440	$ 327,961	$ 291,006
Investment securities:
Taxable	13,885	11,474	27,078	23,388
Tax-exempt	2,933	2,856	5,898	5,705
Dividends	0	109	5	238
Loans held for sale	284	201	500	388
Other interest income	1,243	801	2,415	1,643
Total Interest Income	186,170	163,881	363,857	322,368
INTEREST EXPENSE
Deposits	19,284	12,884	35,734	24,685
Short-term borrowings	3,036	974	5,077	1,829
Federal Home Loan Bank advances and other long-term debt	7,783	8,460	15,661	16,712
Total Interest Expense	30,103	22,318	56,472	43,226
Net Interest Income	156,067	141,563	307,385	279,142
Provision for credit losses	33,117	6,700	37,087	11,500
Net Interest Income After Provision for Credit Losses	122,950	134,863	270,298	267,642
NON-INTEREST INCOME
Other service charges and fees	13,665	14,342	25,084	26,779
Service charges on deposit accounts	12,270	12,914	24,232	25,314
Investment management and trust services	12,803	12,132	25,674	23,940
Mortgage banking income	5,163	6,141	9,356	10,737
Investment securities gains, net	4	1,436	23	2,542
Other	5,189	5,406	10,600	9,732
Non-interest income before investment securities gains	49,090	50,935	94,946	96,502
Total Non-Interest Income	49,094	52,371	94,969	99,044
NON-INTEREST EXPENSE
Salaries and employee benefits	74,919	74,496	150,687	143,732
Net occupancy expense	12,760	12,316	26,392	24,979
Data processing and software	10,453	9,054	20,926	18,033
Other outside services	7,568	7,708	15,692	13,254
Amortization of tax credit investments	1,637	3,151	3,274	4,149
Professional fees	2,372	2,931	7,188	5,668
Equipment expense	3,434	3,034	6,968	6,393
FDIC insurance expense	2,663	2,366	5,616	4,424
Taxes, Other	2,454	2,814	4,756	4,900
Marketing	2,335	2,234	4,585	4,220
Other	12,750	12,591	23,922	25,218
Total Non-Interest Expense	133,345	132,695	270,006	254,970
Income Before Income Taxes	38,699	54,539	95,261	111,716
Income taxes	3,502	9,072	10,584	22,869
Net Income	$ 35,197	$ 45,467	$ 84,677	$ 88,847
PER SHARE:
Net Income (Basic) (in dollars per share)	$ 0.20	$ 0.26	$ 0.48	$ 0.51
Net Income (Diluted) (in dollars per share)	0.20	0.26	0.48	0.51
Cash Dividends (in dollars per share)	$ 0.12	$ 0.11	$ 0.24	$ 0.22