Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 183,491	$ 225,462
Interest-bearing deposits with banks	2,341,604	2,172,001
Federal funds sold	1,209	1,316
Debt securities held for investment (fair value: $1,129 and $1,190, respectively)	1,129	1,190
Debt securities available for sale at fair value	1,533,522	1,553,905
Loans held for sale	5,997	3,489
Loans held for investment (net of unearned interest)	7,781,860	7,656,645
Allowance for credit losses	(97,267)	(96,800)
Loans, net of allowance for credit losses	7,684,593	7,559,845
Premises and equipment, net	284,057	278,594
Other real estate owned	34,728	33,718
Intangible assets, net	15,818	16,704
Goodwill	182,263	182,263
Accrued interest receivable and other assets	334,014	343,555
Total assets	12,602,425	12,372,042
Deposits:
Noninterest-bearing	3,849,807	3,982,226
Interest-bearing	7,059,814	6,717,896
Total deposits	10,909,621	10,700,122
Short-term borrowings	9,699	3,351
Accrued interest payable and other liabilities	127,678	148,577
Subordinated debt	86,115	86,101
Total liabilities	11,133,113	10,938,151
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,966,678 and 32,933,018, respectively	32,967	32,933
Capital surplus	176,227	174,695
Retained earnings	1,312,464	1,276,305
Accumulated other comprehensive loss, net of tax benefit of $16,201 and $15,473, respectively	(52,346)	(50,042)
Total stockholders' equity	1,469,312	1,433,891
Total liabilities and stockholders' equity	12,602,425	12,372,042
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value