Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 203,932	$ 200,781
Interest-bearing deposits in banks	758,001	803,094
Cash and cash equivalents	961,933	1,003,875
Debt securities available-for-sale	3,393,399	3,331,084
Debt securities held-to-maturity (fair value $2,042,912 and $2,095,620, respectively)	2,465,133	2,490,848
Loans held for sale	38,140	33,008
Loans and leases held for investment	18,374,844	18,318,755
Allowance for credit losses - loans and leases	(210,934)	(208,071)
Loans and leases, net	18,163,910	18,110,684
Premises and equipment, net	386,052	378,421
Bank owned life insurance	342,486	345,371
Goodwill and other intangible assets, net	987,539	990,087
Other assets	626,296	613,873
Total assets	27,364,888	27,297,251
Deposits:
Noninterest-bearing demand	6,409,659	6,534,307
Interest-bearing deposits	16,922,350	16,776,304
Total deposits	23,332,009	23,310,611
Long-term debt	324,854	324,823
Accrued expenses and other liabilities	407,915	400,292
Total liabilities	24,064,778	24,035,726
Shareholders' equity:
Preferred stock, $1 par value: 10,000,000 shares authorized; 3,662 shares Series I issued and outstanding; $25,000 per share liquidation preference	88,266	88,266
Common stock, $1 par value: 200,000,000 shares authorized, 119,136,518 and 119,010,319 shares issued and outstanding, respectively	119,137	119,010
Common stock issuable: 560,833 and 620,108 shares, respectively	11,923	13,110
Capital surplus	2,702,807	2,699,112
Retained earnings	614,612	581,219
Accumulated other comprehensive loss	(236,635)	(239,192)
Total shareholders' equity	3,300,110	3,261,525
Total liabilities and shareholders' equity	$ 27,364,888	$ 27,297,251