Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net income	$ 39,260,000	$ 47,382,000
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	9,855,000	10,200,000
Accretion of acquired loans	0	(102,000)
Provision for credit losses	3,500,000	(900,000)
Stock-based compensation expense	2,398,000	1,725,000
Stock grants to directors for retainer fee	347,000	344,000
Proceeds from sales of mortgage loans held for sale	195,374,000	509,763,000
Origination of mortgage loans held for sale	(186,881,000)	(510,571,000)
Net gain from sales of mortgage loans held for sale	(6,787,000)	(23,551,000)
Net gain from sales and valuation write-downs of foreclosed assets	(47,000)	(74,000)
Net loss from sales and valuation write-downs of former bank premises	275,000	243,000
Net (gain) loss from sales and write-downs of fixed assets	(18,000)	246,000
Earnings on bank owned life insurance	(1,310,000)	(872,000)
Change in fair value of derivative asset	(23,836,000)	(3,865,000)
Change in fair value of derivative liability	23,687,000	4,060,000
Gain on sale of branch	0	(1,058,000)
Net change in:
Accrued interest receivable	(4,677,000)	853,000
Other assets	(407,000)	(11,504,000)
Accrued interest payable and other liabilities	32,060,000	(3,150,000)
Net cash from operating activities	82,793,000	19,169,000
Cash flows from investing activities
Loan originations and payments, net	(426,842,000)	(129,522,000)
Purchases of securities available for sale	(91,200,000)	(257,967,000)
Proceeds from maturities, calls and repayments of securities available for sale	13,262,000	77,531,000
Proceeds from sales of foreclosed assets	47,000	181,000
Proceeds from sales of former bank premises	2,994,000	270,000
Proceeds from Federal Home Loan Bank stock redemption	281,000	0
Proceeds from bank owned life insurance death benefits claim	628,000	0
Net cash transferred in branch sale	0	(2,679,000)
Net purchases of premises and equipment and lease activity	(2,166,000)	(4,250,000)
Net cash for investing activities	(502,996,000)	(316,436,000)
Cash flows from financing activities
Net decrease in time deposits	(53,239,000)	(113,842,000)
Net (decrease) increase in all other deposits	(183,869,000)	585,924,000
Net increase in securities sold under agreements to repurchase	1,142,000	57,485,000
Maturities of Federal Home Loan Bank advances	(64,000,000)	0
Proceeds from Federal Home Loan Bank advances	28,263,000	0
Net proceeds from subordinated notes issuance	14,645,000	0
Proceeds from stock option exercises, net of cashless exercises	36,000	50,000
Employee stock purchase plan	33,000	35,000
Dividend reinvestment plan	653,000	648,000
Repurchases of common stock shares	0	(19,798,000)
Payment of cash dividends to common shareholders	(14,607,000)	(13,880,000)
Net cash (for) from financing activities	(270,943,000)	496,622,000
Net change in cash and cash equivalents	(691,146,000)	199,355,000
Cash and cash equivalents at beginning of period	975,160,000	626,006,000
Cash and cash equivalents at end of period	284,014,000	825,361,000
Supplemental disclosures of cash flows information
Interest	15,372,000	15,826,000
Federal income tax	6,000,000	14,450,000
Noncash financing and investing activities:
Transfers from premises and equipment to other assets	2,847,000	0
Transfers from loans to foreclosed assets	$ 0	$ 30,000