CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Document Period End Date				Sep. 30, 2020
Interest income
Loans, including fees		$ 103,249	$ 126,786	$ 324,924	$ 376,207
Investment securities
Taxable		17,906	22,180	55,387	70,031
Tax-exempt		4,884	4,457	14,403	13,051
Total interest on investment securities		22,790	26,637	69,790	83,082
Other earning assets		31	222	220	638
Total interest income		126,070	153,645	394,934	459,927
Interest expense
Deposits		7,886	20,151	36,002	60,006
Short-term borrowings		51	7,199	6,412	19,805
Long-term borrowings		5,953	4,760	14,482	14,764
Total interest expense		13,890	32,110	56,896	94,575
Net interest income		112,180	121,535	338,038	365,352
Provision for Credit Losses	[1]	15,299	5,228	57,038	25,969
Provision for credit losses	[1]	(1,925)	(216)	2,013	(342)
Net interest income after provision for loan and lease losses		98,806	116,523	278,987	339,725
Noninterest income
Service Charges on Deposit Accounts		7,356	9,874	21,792	28,596
Trust and wealth management fees		3,855	3,718	12,438	11,731
Bankcard income		3,124	3,316	8,666	15,399
Client derivative fees		2,203	4,859	8,292	11,468
Foreign exchange income		10,530	1,708	27,072	1,725
Net gain from sales of loans		18,594	4,806	38,087	10,128
Net gain (loss) on sales/transfers of investment securities		2	105	(55)	(110)
Other		3,835	4,754	11,316	15,668
Total noninterest income		49,499	33,140	127,608	94,605
Noninterest expenses
Salaries and employee benefits		63,769	53,212	174,516	155,109
Net occupancy		5,625	5,509	17,107	17,735
Furniture and equipment		3,638	4,120	11,372	11,758
Data processing		6,837	5,774	20,245	15,885
Marketing		1,856	1,346	4,415	4,928
Communication		855	910	2,652	2,385
Professional services		2,443	4,771	6,923	9,062
State intangible tax		1,514	1,445	4,544	4,062
FDIC assessments		1,350	(1,097)	4,045	918
Intangible assets amortization		2,779	2,432	8,362	6,521
Other		6,845	8,020	21,685	21,082
Total noninterest expenses		97,511	86,442	275,866	249,445
Income before income taxes		50,794	63,221	130,729	184,885
Income tax expense		9,317	12,365	23,231	35,487
Net income		$ 41,477	$ 50,856	$ 107,498	$ 149,398
Earnings per common share
Basic		$ 0.43	$ 0.52	$ 1.10	$ 1.52
Diluted		0.42	0.51	1.10	1.51
Cash dividends declared per share		$ 0.23	$ 0.23	$ 0.69	$ 0.67
Average common shares outstanding - basic		97,247,080	98,517,025	97,400,942	98,177,802
Average common shares outstanding - diluted		98,008,733	99,077,723	98,117,463	98,723,173

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.