CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income:
Interest and fees on loans	$ 579,960	$ 462,121	$ 423,152
Interest on loans held for sale	896	738	1,736
Interest on deposits with banks	22,435	2,672	725
Interest and dividend income on investment securities:
Taxable	26,992	20,519	16,118
Tax-advantaged	7,224	9,609	8,552
Interest on federal funds sold	17	8	1
Total interest income	637,524	495,667	450,284
Interest expense:
Interest on deposits	225,028	43,854	15,022
Interest on retail repurchase agreements and federal funds purchased	14,452	2,929	182
Interest on advances from FHLB	27,709	7,825	2,649
Interest on subordinated debt	15,785	14,055	7,913
Total interest expense	282,974	68,663	25,766
Net interest income	354,550	427,004	424,518
Provision/ (credit) for credit losses	(17,561)	34,372	(45,556)
Net interest income after provision/ (credit) for credit losses	372,111	392,632	470,074
Non-interest income:
Investment securities gains/ (losses)	0	(345)	212
Gain on disposal of assets	0	16,516	0
Insurance agency commissions	0	2,927	7,017
Income from bank owned life insurance	4,210	3,141	3,022
Other income	8,483	8,694	15,317
Total non-interest income	67,078	87,019	102,055
Non-interest expense:
Salaries and employee benefits	160,192	158,504	155,830
Occupancy expense of premises	18,778	19,255	22,405
Equipment expenses	15,675	14,779	12,883
Marketing	5,103	5,197	4,730
Outside data services	11,186	10,199	8,983
FDIC insurance	9,461	4,792	4,294
Amortization of intangible assets	5,223	5,814	6,600
Merger, acquisition and disposal expense	0	1,068	45
Professional fees and services	17,982	9,169	10,308
Other expenses	31,454	28,516	34,392
Total non-interest expense	275,054	257,293	260,470
Income before income tax expense	164,135	222,358	311,659
Income tax expense	41,291	56,059	76,552
Net income	$ 122,844	$ 166,299	$ 235,107
Net income per common share amounts:
Basic net income per common share (in dollars per share)	$ 2.74	$ 3.69	$ 5.00
Diluted net income per common share (in dollars per share)	2.73	3.68	4.98
Dividends declared per share (in dollars per share)	$ 1.36	$ 1.36	$ 1.28
Service charges on deposit accounts
Non-interest income:
Fees and commissions, mortgage banking and servicing	$ 10,447	$ 9,803	$ 8,241
Mortgage banking activities
Non-interest income:
Fees and commissions, mortgage banking and servicing	5,536	6,130	24,509
Wealth management income
Non-interest income:
Fees and commissions, mortgage banking and servicing	36,633	35,774	36,841
Bank card fees
Non-interest income:
Fees and commissions, mortgage banking and servicing	$ 1,769	$ 4,379	$ 6,896