Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest revenue:
Loans, including fees	$ 673,402	$ 505,734	$ 494,212
Investment securities:
Taxable	121,501	61,994	55,031
Tax exempt	10,323	8,978	7,043
Deposits in banks and short-term investments	7,929	2,088	1,710
Total interest revenue	813,155	578,794	557,996
Interest expense:
Deposits	42,099	14,845	41,772
Short-term borrowings	507	0	3
Federal Home Loan Bank advances	1,424	3	28
Long-term debt	16,768	14,912	14,434
Total interest expense	60,798	29,760	56,237
Net interest revenue	752,357	549,034	501,759
Provision for credit losses	63,913	(37,550)	80,434
Net interest revenue after provision for credit losses	688,444	586,584	421,325
Noninterest income:
Wealth management fees	23,594	18,998	9,240
Gains from other loan sales, net	10,730	11,267	5,420
Other lending and loan servicing fees	10,005	9,427	8,028
Securities (losses) gains, net	(3,872)	83	748
Other	26,563	25,729	24,185
Total noninterest income	137,707	157,818	156,109
Total revenue	826,151	744,402	577,434
Noninterest expenses:
Salaries and employee benefits	276,205	241,443	224,060
Occupancy	36,247	28,619	25,791
Communications and equipment	38,234	29,829	27,149
Professional fees	20,166	20,589	18,032
Lending and loan servicing expense	9,350	10,859	10,993
Outside services - electronic banking	12,583	9,481	7,513
Postage, printing and supplies	8,749	7,110	6,779
Advertising and public relations	8,384	5,910	15,203
FDIC assessments and other regulatory charges	9,894	7,398	5,982
Amortization of intangibles	6,826	4,045	4,168
Merger-related and other charges	19,375	13,970	7,018
Other	24,136	17,386	15,301
Total noninterest expenses	470,149	396,639	367,989
Income before income taxes	356,002	347,763	209,445
Income tax expense	78,530	77,962	45,356
Net income	277,472	269,801	164,089
Net income available to common shareholders, basic	269,135	261,269	159,269
Net income available to common shareholders, diluted	$ 269,135	$ 261,269	$ 159,269
Income per common share:
Basic (in dollars per share)	$ 2.52	$ 2.97	$ 1.91
Diluted (in dollars per share)	$ 2.52	$ 2.97	$ 1.91
Weighted average common shares outstanding:
Basic (in shares)	106,661	87,940	83,184
Diluted (in shares)	106,778	88,097	83,248
Service charges and fees
Noninterest income:
Service charges and other related fees	$ 38,163	$ 33,868	$ 32,401
Mortgage loan gains and related fees
Noninterest income:
Service charges and other related fees	$ 32,524	$ 58,446	$ 76,087