Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities:
Net income	$ 294,083,000	$ 305,392,000
Adjustments to reconcile net income to net cash provided by operating activities:
Credit loss expense	30,351,000	27,879,000
Specific reserve, other real estate owned	371,000	2,510,000
Depreciation of bank premises and equipment	16,938,000	16,362,000
Gain on sale of bank premises and equipment	(353,000)	(198,000)
Loss (gain) on sale of other real estate owned	166,000	(6,833,000)
Accretion of investment securities discounts	(1,977,000)	(1,431,000)
Amortization of investment securities premiums	4,185,000	5,244,000
Investment securities transactions, net	1,000	3,000
Unrealized (gain) loss on equity securities with readily determinable fair values	(121,000)	200,000
Stock based compensation expense	169,000	255,000
Earnings from affiliates and other investments	(5,562,000)	(367,000)
Deferred tax expense	10,259,000	4,747,000
Increase in accrued interest receivable	(7,573,000)	(11,872,000)
Increase in other assets	(5,546,000)	(38,158,000)
Increase in other liabilities	23,675,000	37,927,000
Net cash provided by operating activities	359,066,000	341,660,000
Investing activities:
Proceeds from maturities of securities	2,075,000	51,167,000
Proceeds from sales and calls of available for sale securities	3,750,000	2,045,000
Purchases of available for sale securities	(610,182,000)	(980,571,000)
Principal collected on mortgage backed securities	581,867,000	474,282,000
Net increase in loans	(562,585,000)	(471,695,000)
Purchases of other investments	(33,077,000)	(25,431,000)
Distributions from other investments	29,158,000	8,773,000
Purchases of bank premises and equipment	(15,793,000)	(19,079,000)
Proceeds from sales of bank premises and equipment	583,000	269,000
Proceeds from sales of other real estate owned	1,249,000	7,777,000
Net cash used in investing activities	(602,955,000)	(952,463,000)
Financing activities:
Net decrease in non-interest bearing demand deposits	(308,918,000)	(629,637,000)
Net increase (decrease) in savings and interest bearing demand deposits	208,835,000	(388,433,000)
Net increase in time deposits	376,584,000	274,672,000
Net increase in securities sold under repurchase agreements	175,842,000	73,090,000
Net decrease in other borrowed funds	(152,000)	(148,000)
Redemption of long-term debt		(25,774,000)
Purchase of treasury stock	(742,000)	(4,487,000)
Proceeds from stock transactions	3,296,000	654,000
Payments of cash dividends	(82,078,000)	(78,247,000)
Net cash provided by (used in) financing activities	372,667,000	(778,310,000)
Increase (decrease) in cash and cash equivalents	128,778,000	(1,389,113,000)
Cash and cash equivalents at beginning of period	651,058,000	2,087,724,000
Cash and cash equivalents at end of period	779,836,000	698,611,000
Supplemental cash flow information:
Interest paid	149,295,000	77,834,000
Income taxes paid	49,239,000	69,799,000
Non-cash investing and financing activities:
Purchases of available-for-sale securities not yet settled	60,000,000
Net transfers from loans to other real estate owned	$ 3,200,000	$ 554,000