Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 152,997	$ 175,807
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	9,290	9,589
Provision for credit losses	10,631	13,353
Securities premium amortization, net	40,376	55,355
Discount accretion on purchased loans	0	(1,119)
Gain on sale of securities and other assets, net	(735)	(3,986)
Stock-based compensation	3,033	2,672
Net tax benefit from stock-based compensation	269	353
Deferred federal income tax benefit	1,789	0
Change in loans held-for-sale	(312)	17,967
Change in other assets	(371)	11,827
Change in other liabilities	9,126	(27,412)
Total adjustments	73,096	78,599
Net cash provided by operating activities	226,093	254,406
Activity in available-for-sale securities:
Sales	320,419	205,444
Maturities	333,273	2,773,665
Purchases	(3,322)	(3,131,413)
Net increase in loans held-for-investment	(553,762)	(862,636)
Purchases of bank premises, equipment and software	(13,386)	(11,970)
Proceeds from sale of bank premises and equipment and other assets	3,740	1,186
Net cash provided by (used in) investing activities	86,962	(1,025,724)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(584,235)	420,562
Net increase in interest-bearing deposits	295,250	155,068
Net change in borrowings	109,036	103,429
Common stock transactions:
Proceeds from stock option exercises/stock unit conversions/restricted stock activity	1,483	5,974
Dividends paid	(74,247)	(67,072)
Repurchase of stock	(2,735)	(9,449)
Net cash provided by (used in) financing activities	(255,448)	608,512
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	57,607	(162,806)
CASH AND CASH EQUIVALENTS, beginning of period	330,678	528,588
CASH AND CASH EQUIVALENTS, end of period	388,285	365,782
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	87,127	14,067
Federal income taxes paid	35,529	33,050
Investment securities purchased not settled	2,500	0
Transfer of loans to other real estate	$ 190	$ 0