Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 274,872	$ 228,819
Interest-bearing deposits with banks	3,816,532	1,821,203
Federal funds sold	3,489	800
Debt securities held for investment (fair value: $2,917 and $2,978, respectively)	2,917	2,977
Debt securities available for sale at fair value	1,208,751	531,523
Loans held for sale	10,137	24,776
Loans held for investment (net of unearned interest)	6,494,340	6,169,442
Allowance for credit losses	(87,239)	(83,936)
Loans, net of allowance for credit losses	6,407,101	6,085,506
Premises and equipment, net	283,843	269,047
Other real estate owned	39,617	39,475
Intangible assets, net	25,456	17,566
Goodwill	176,563	149,922
Accrued interest receivable and other assets	375,153	233,998
Total assets	12,624,431	9,405,612
Deposits:
Noninterest-bearing	5,216,266	3,775,387
Interest-bearing	6,034,705	4,316,527
Total deposits	11,250,971	8,091,914
Short-term borrowings	3,300	0
Accrued interest payable and other liabilities	116,357	55,977
Subordinated debt	86,001	85,987
Total liabilities	11,456,629	8,233,878
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,725,587 and 32,603,118, respectively	32,726	32,603
Capital surplus	163,392	159,914
Retained earnings	1,001,200	977,067
Accumulated other comprehensive (loss) income, net of tax of $9,166 and $(684), respectively	(29,516)	2,150
Total stockholders' equity	1,167,802	1,171,734
Total liabilities and stockholders' equity	12,624,431	$ 9,405,612
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value