CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks	$ 274,354	$ 309,045
Interest bearing deposits with other banks and other short-term investments	87,757	54,042
Cash and cash equivalents	362,111	363,087
Time deposits in other financial institutions	1,740	1,740
Securities:
Carried at fair value (cost of $6,670,971 at March 31, 2023, and $6,788,729 at December 31, 2022)	6,096,657	6,147,144
Held to maturity, net of allowance for credit losses of $0 at both March 31, 2023, and December 31, 2022 (fair value of $815,672 at March 31, 2023, and $776,557 at December 31, 2022)	832,098	829,403
Other investments, at cost	72,364	74,567
Loans held for sale	10,425	5,277
Loans receivable:
Held to maturity	11,495,353	11,428,352
Allowance for credit losses	(112,707)	(109,483)
Loans receivable, net	11,382,646	11,318,869
Premises, furniture and equipment, net	186,868	190,479
Premises, furniture and equipment held for sale	4,399	6,851
Other real estate, net	7,438	8,401
Goodwill	576,005	576,005
Core deposit intangibles and customer relationship intangibles, net	23,366	25,154
Servicing rights, net	0	7,840
Cash surrender value on life insurance	194,419	193,403
Other assets	432,008	496,008
TOTAL ASSETS	20,182,544	20,244,228
Deposits:
Demand	5,119,554	5,701,340
Savings	9,256,609	9,994,391
Time	3,305,183	1,817,278
Total deposits	17,681,346	17,513,009
Short-term borrowings	92,337	376,117
Other borrowings	372,097	371,753
Accrued expenses and other liabilities	207,359	248,294
TOTAL LIABILITIES	18,353,139	18,509,173
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 60,000,000 shares authorized at both March 31, 2023, and December 31, 2022; issued 42,558,726 shares at March 31, 2023, and 42,467,394 shares at December 31, 2022)	42,559	42,467
Capital surplus	1,084,112	1,080,964
Retained earnings	1,158,948	1,120,925
Accumulated other comprehensive loss	(566,919)	(620,006)
TOTAL STOCKHOLDERS' EQUITY	1,829,405	1,735,055
TOTAL LIABILITIES AND EQUITY	20,182,544	20,244,228
Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series A Junior Participating preferred stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series B Fixed Rate Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series D Senior Non-Cumulative Perpetual Convertible Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series E Fixed-Rate Reset Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 110,705	$ 110,705