CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Interest and fees on loans	$ 462,121	$ 423,152	$ 393,477
Interest on loans held for sale	738	1,736	1,686
Interest on deposits with banks	2,672	725	446
Interest and dividend income on investment securities:
Taxable	20,519	16,118	22,136
Tax-advantaged	9,609	8,552	5,814
Interest on federal funds sold	8	1	1
Total interest income	495,667	450,284	423,560
Interest expense:
Interest on deposits	43,854	15,022	41,651
Interest on retail repurchase agreements and federal funds purchased	2,929	182	1,965
Interest on advances from FHLB	7,825	2,649	6,593
Interest on subordinated debt	14,055	7,913	10,192
Total interest expense	68,663	25,766	60,401
Net interest income	427,004	424,518	363,159
Provision/ (credit) for credit losses	34,372	(45,556)	85,669
Net interest income after provision/ (credit) for credit losses	392,632	470,074	277,490
Non-interest income:
Investment securities gains/ (losses)	(345)	212	467
Gain on disposal of assets	16,516	0	0
Insurance agency commissions	2,927	7,017	6,795
Income from bank owned life insurance	3,141	3,022	2,867
Other income	8,694	15,317	9,221
Total non-interest income	87,019	102,055	102,716
Non-interest expense:
Salaries and employee benefits	158,504	155,830	134,471
Occupancy expense of premises	19,255	22,405	21,383
Equipment expenses	14,779	12,883	12,224
Marketing	5,197	4,730	4,281
Outside data services	10,199	8,983	8,759
FDIC insurance	4,792	4,294	4,727
Amortization of intangible assets	5,814	6,600	6,221
Merger, acquisition and disposal expense	1,068	45	25,174
Professional fees and services	9,169	10,308	7,939
Other expenses	28,516	34,392	30,603
Total non-interest expense	257,293	260,470	255,782
Income before income tax expense	222,358	311,659	124,424
Income tax expense	56,059	76,552	27,471
Net income	$ 166,299	$ 235,107	$ 96,953
Net income per common share amounts:
Basic net income per common share (in dollars per share)	$ 3.69	$ 5.00	$ 2.19
Diluted net income per common share (in dollars per share)	3.68	4.98	2.18
Dividends declared per share (in dollars per share)	$ 1.36	$ 1.28	$ 1.20
Service charges on deposit accounts
Non-interest income:
Fees and commissions, mortgage banking and servicing	$ 9,803	$ 8,241	$ 7,066
Mortgage banking activities
Non-interest income:
Fees and commissions, mortgage banking and servicing	6,130	24,509	40,058
Wealth management income
Non-interest income:
Fees and commissions, mortgage banking and servicing	35,774	36,841	30,570
Bank card fees
Non-interest income:
Fees and commissions, mortgage banking and servicing	$ 4,379	$ 6,896	$ 5,672