Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 103,441	$ 116,466
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	6,268	6,436
PROVISION FOR CREDIT LOSSES	8,354	10,132
Securities premium amortization, net	27,151	38,727
Discount accretion on purchased loans	0	(746)
Gain on sale of securities and other assets, net	(1,021)	(2,777)
Deferred federal income tax benefit	1,555	1,421
Change in loans held-for-sale	(7,167)	10,980
Change in other assets	9,397	(1,077)
Change in other liabilities	5,001	(21,216)
Total adjustments	49,538	41,880
Net cash provided by operating activities	152,979	158,346
Activity in available-for-sale securities:
Sales	207,287	188,363
Maturities	233,935	2,615,256
Purchases	(3,322)	(3,115,482)
Net increase in loans held-for-investment	(336,122)	(487,862)
Purchases of bank premises and equipment	(8,966)	(5,245)
Proceeds from sale of bank premises and equipment and other assets	2,598	6
Net cash provided by (used in) investing activities	95,410	(804,964)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(483,305)	323,804
Net increase in interest-bearing deposits	285,358	232,691
Net change in borrowings	(54,851)	97,212
Common stock transactions:
Proceeds from stock option exercises	1,128	4,346
Dividends paid	(48,540)	(67,054)
Repurchase of stock	0	(7,405)
Net cash provided by (used in) financing activities	(300,210)	583,594
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(51,821)	(63,024)
CASH AND CASH EQUIVALENTS, beginning of period	330,678	528,588
CASH AND CASH EQUIVALENTS, end of period	278,857	465,564
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	51,327	4,567
Federal income taxes paid	25,032	20,981
Transfer of loans to other real estate	190	0
Restricted stock grant	$ 1,066	$ 1,210