CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 208,176	$ 275,554
Interest bearing deposits with other banks and other short-term investments	236,190	47,459
Cash and cash equivalents	444,366	323,013
Time deposits in other financial institutions	1,240	1,240
Securities:
Carried at fair value (cost of $4,886,304 at March 31, 2024, and $5,100,344 at December 31, 2023)	4,418,222	4,646,891
Held to maturity, net of allowance for credit losses of $0 at both March 31, 2024, and December 31, 2023 (fair value of $813,752 at March 31, 2024, and $816,399 at December 31, 2023)	841,055	838,241
Other investments, at cost	68,524	91,277
Loans held for sale	352,744	5,071
Loans receivable:
Held to maturity	11,644,641	12,068,645
Allowance for credit losses	(123,934)	(122,566)
Loans receivable, net	11,520,707	11,946,079
Premises, furniture and equipment, net	160,518	177,001
Premises, furniture and equipment held for sale	16,064	4,069
Other real estate, net	2,590	12,548
Goodwill	576,005	576,005
Core deposit intangibles, net	16,923	18,415
Cash surrender value on life insurance	197,671	197,085
Other assets	516,198	574,772
TOTAL ASSETS	19,132,827	19,411,707
Deposits:
Demand	4,264,390	4,500,304
Savings	8,669,221	8,805,597
Time	2,368,555	2,895,813
Total deposits	15,302,166	16,201,714
Deposits held for sale	596,328	0
Borrowings	650,033	622,255
Term debt	372,652	372,396
Accrued expenses and other liabilities	232,815	282,225
TOTAL LIABILITIES	17,153,994	17,478,590
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 60,000,000 shares authorized at both March 31, 2024, and December 31, 2023; issued 42,783,670 shares at March 31, 2024, and 42,688,008 shares at December 31, 2023)	42,784	42,688
Capital surplus	1,093,207	1,090,740
Retained earnings	1,178,330	1,141,501
Accumulated other comprehensive loss	(446,193)	(452,517)
TOTAL STOCKHOLDERS' EQUITY	1,978,833	1,933,117
TOTAL LIABILITIES AND EQUITY	19,132,827	19,411,707
Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0
Preferred stock, shares outstanding (in shares)	0	0
Series E Fixed-Rate Reset Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 110,705	$ 110,705
Preferred stock, shares outstanding (in shares)	11,500	11,500