Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income	$ 23,229,000	$ 32,331,000
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	6,692,000	6,755,000
Accretion of acquired loans	0	(68,000)
Provision for credit losses	600,000	(2,800,000)
Stock-based compensation expense	1,608,000	1,277,000
Stock grants to directors for retainer fee	347,000	344,000
Proceeds from sales of mortgage loans held for sale	135,521,000	352,740,000
Origination of mortgage loans held for sale	(127,413,000)	(340,680,000)
Net gain from sales of mortgage loans held for sale	(4,955,000)	(16,892,000)
Net gain from sales and valuation write-downs of foreclosed assets	(20,000)	(81,000)
Net loss from sales and valuation write-downs of former bank premises	0	245,000
Net loss from sales and write-downs of fixed assets	391,000	246,000
Earnings on bank owned life insurance	(1,072,000)	(574,000)
Gain on sale of branch	0	(1,058,000)
Net change in:
Accrued interest receivable	(1,573,000)	1,188,000
Other assets	(11,749,000)	(9,099,000)
Accrued interest payable and other liabilities	28,391,000	(1,695,000)
Net cash from operating activities	49,997,000	22,179,000
Cash flows from investing activities
Loan originations and payments, net	(269,930,000)	(64,298,000)
Purchases of securities available for sale	(78,640,000)	(168,906,000)
Proceeds from maturities, calls and repayments of securities available for sale	11,641,000	44,525,000
Proceeds from sales of foreclosed assets	20,000	158,000
Proceeds from sales of former bank premises	0	5,000
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	(399,000)	(3,555,000)
Net cash for investing activities	(336,399,000)	(194,750,000)
Cash flows from financing activities
Net decrease in time deposits	(77,992,000)	(92,581,000)
Net (decrease) increase in all other deposits	(131,308,000)	366,943,000
Net increase in securities sold under agreements to repurchase	5,876,000	51,372,000
Maturities of Federal Home Loan Bank advances	(40,000,000)	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	0
Employee stock purchase plan	21,000	22,000
Dividend reinvestment plan	435,000	411,000
Repurchases of common stock shares	0	(10,851,000)
Payment of cash dividends to common shareholders	(9,629,000)	(9,220,000)
Net cash (for) from financing activities	(209,653,000)	306,096,000
Net change in cash and cash equivalents	(496,055,000)	133,525,000
Cash and cash equivalents at beginning of period	975,160,000	626,006,000
Cash and cash equivalents at end of period	479,105,000	759,531,000
Supplemental disclosures of cash flows information
Interest	8,780,000	10,583,000
Federal income tax	5,200,000	12,150,000
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