Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income before income taxes	$ 80,141	$ 95,068	$ 244,218	$ 247,469
Interest income
Interest and fees on loans	187,145	150,157	537,830	413,770
Interest Income, Securities, Operating, Taxable	14,817	13,243	45,707	34,567
Nontaxable interest and dividends on securities	1	1	4	4
Interest on loans held for sale	60	51	133	150
Interest on federal funds sold and short-term investments	905	6,519	4,882	10,222
Total interest and dividend income	202,928	169,971	588,556	458,713
Interest expense
Interest on deposits	40,713	6,109	95,297	10,327
Interest on borrowings	12,335	1,261	31,835	3,492
Total interest expense	53,048	7,370	127,132	13,819
Net interest income	149,880	162,601	461,424	444,894
Provision for credit losses	5,500	3,000	17,750	1,000
Net interest income after provision for credit losses	144,380	159,601	443,674	443,894
Noninterest income
Deposit account fees	5,936	6,261	17,360	17,582
Interchange and ATM fees	4,808	4,331	13,470	11,967
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	10,246	8,436	30,373	26,438
Mortgage banking income	739	585	1,717	2,989
Bank Owned Life Insurance Income	1,983	1,883	5,777	5,549
Gain Realized on Life Insurance Policies	(1,924)	(477)	(2,111)	(600)
Loan level derivative income	842	471	2,525	1,511
Other noninterest income	7,065	5,751	19,209	15,729
Total noninterest income	33,543	28,195	92,542	82,365
Noninterest expenses
Salaries and employee benefits	54,797	52,708	165,747	150,957
Occupancy and equipment expenses	12,321	12,316	37,528	37,255
Data processing & facilities management	2,404	2,259	7,461	6,878
Professional Fees	2,753	2,547	6,765	7,057
Software Maintenance	3,324	2,497	9,407	7,706
Debit card expense	2,319	1,936	6,707	5,562
Amortization of Intangible Assets	1,712	1,898	5,243	5,801
FDIC assessment	2,727	1,677	8,011	5,225
Business Combination, Acquisition Related Costs	0	0	0	7,100
Other noninterest expenses	15,425	14,890	45,129	45,249
Total noninterest expenses	97,782	92,728	291,998	278,790
Income before income taxes	80,141	95,068	244,218	247,469
Current Federal, State and Local, Tax Expense (Benefit)	19,333	23,171	59,519	60,699
Net income	$ 60,808	$ 71,897	$ 184,699	$ 186,770
Basic earnings per share (in dollars per share)	$ 1.38	$ 1.57	$ 4.16	$ 4.01
Diluted earnings per share (in dollars per share)	$ 1.38	$ 1.57	$ 4.16	$ 4.00
Weighted average common shares (basic) (in shares)	44,135,487	45,839,555	44,419,731	46,618,209
Common shares equivalents (in shares)	11,417	16,856	12,851	17,221
Weighted average common shares (diluted) (in shares)	44,146,904	45,856,411	44,432,582	46,635,430
Retained Earnings [Member]
Noninterest expenses
Net income	$ 60,808	$ 71,897	$ 184,699	$ 186,770
Cash dividends declared per common share (in dollars per share)	$ 0.55	$ 0.51	$ 1.65	$ 1.53