Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
INTEREST INCOME
Loans	$ 154,537	$ 140,004	$ 304,707	$ 291,030
Securities:
Taxable interest	29,780	25,870	56,942	53,082
Tax-exempt interest	24,743	24,612	49,707	49,016
Total securities income	54,523	50,482	106,649	102,098
Federal funds and resell agreements	2,552	1,573	5,373	7,025
Interest-bearing due from banks	833	398	1,536	3,061
Trading securities	189	312	348	966
Total interest income	212,634	192,769	418,613	404,180
INTEREST EXPENSE
Deposits	6,574	11,243	13,372	40,975
Federal funds and repurchase agreements	1,779	1,950	3,665	8,331
Other	3,210	1,347	6,390	2,704
Total interest expense	11,563	14,540	23,427	52,010
Net interest income	201,071	178,229	395,186	352,170
Provision for credit losses	24,000	21,500	16,500	109,500
Net interest income after provision for credit losses	177,071	156,729	378,686	242,670
NONINTEREST INCOME
Trust and securities processing	53,863	46,321	108,697	93,321
Trading and investment banking	8,670	12,851	18,026	14,574
Service charges on deposit accounts	22,592	19,074	44,568	44,155
Insurance fees and commissions	245	533	665	792
Brokerage fees	2,592	5,753	5,926	15,613
Bankcard fees	16,063	12,916	30,736	29,461
Investment securities gains, net	15,455	4,579	7,119	8,099
Other	12,109	18,429	24,749	12,865
Total noninterest income	131,589	120,456	240,486	218,880
NONINTEREST EXPENSE
Salaries and employee benefits	120,415	130,938	248,096	241,998
Occupancy, net	12,296	11,411	24,231	23,591
Equipment	19,196	21,502	38,811	42,743
Supplies and services	3,469	3,785	6,961	7,970
Marketing and business development	4,797	3,284	7,142	7,924
Processing fees	16,501	13,603	31,918	26,993
Legal and consulting	8,147	6,220	13,902	12,330
Bankcard	4,529	4,549	9,485	9,409
Amortization of other intangible assets	1,157	1,658	2,537	3,392
Regulatory fees	2,769	3,211	5,315	5,577
Other	8,062	8,372	13,886	15,225
Total noninterest expense	201,338	208,533	402,284	397,152
Income before income taxes	107,322	68,652	216,888	64,398
Income tax expense	19,910	8,123	36,833	7,308
NET INCOME	$ 87,412	$ 60,529	$ 180,055	$ 57,090
PER SHARE DATA
Net income – basic	$ 1.81	$ 1.26	$ 3.74	$ 1.18
Net income – diluted	1.79	1.26	3.70	1.18
Dividends	$ 0.32	$ 0.31	$ 0.64	$ 0.62
Weighted average shares outstanding – basic	48,294,952	47,991,283	48,196,345	48,340,579
Weighted average shares outstanding – diluted	48,698,319	48,077,810	48,604,140	48,491,526