Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net income	$ 84,740,000	$ 107,369,000	$ 95,041,000
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization (accretion) of premiums, discounts and deferred loan fees and costs	5,351,000	5,918,000	(3,981,000)
Depreciation and amortization	5,115,000	5,138,000	5,126,000
Amortization of intangible assets	2,029,000	2,351,000	868,000
Amortization of operating lease right-of-use assets	4,616,000	9,319,000	2,267,000
Provision (benefit) for credit losses	13,052,000	8,514,000	(10,896,000)
Stock-based compensation	4,982,000	5,777,000	4,073,000
Loans originated for sale	(51,249,000)	(57,467,000)	(56,956,000)
Proceeds from sales of loans held for sale	52,634,000	66,259,000	58,612,000
Gains on investment securities transactions, net	0	0	(9,000)
Gains on sales of loans held for sale	(1,513,000)	(2,765,000)	(2,264,000)
Income on bank owned life insurance	(3,276,000)	(3,124,000)	(2,550,000)
Gain on death benefits from bank owned life insurance	(220,000)	(855,000)	(126,000)
Change in fair value of equity securities	(110,000)	1,302,000	285,000
Gains on other real estate and other repossessed assets	(19,000)	(23,000)	(32,000)
Loss on sale of premises and equipment	42,000	872,000	281,000
Loss on property held for sale	41,000	0	0
Loss on property held for sale	0	345,000	0
Long-term debt extinguishment costs	0	0	831,000
Deferred tax (benefit) expense	(1,017,000)	2,747,000	5,422,000
Excess tax benefits (deficiencies)	130,000	69,000	(89,000)
Decrease (increase) in other assets	5,942,000	(68,863,000)	36,589,000
(Decrease) increase in other liabilities	(5,665,000)	41,813,000	(37,389,000)
Net Cash Provided by Operating Activities	115,605,000	124,696,000	95,103,000
Cash Flows from Investing Activities:
Net cash acquired in acquisitions	0	326,236,000	0
Proceeds from repayments and maturities of available for sale securities	113,299,000	135,960,000	181,706,000
Proceeds from repayments and maturities of held to maturity securities	94,493,000	137,241,000	66,709,000
Proceeds from sales of available for sale securities	0	0	4,402,000
Purchase of available for sale securities	0	(312,904,000)	(611,589,000)
Purchase of held to maturity securities	(12,265,000)	(117,233,000)	(310,128,000)
Purchase of equity securities	(304,000)	(1,217,000)	(2,959,000)
Proceeds from redemptions of Federal Home Loan Bank stock	224,809,000	78,451,000	13,817,000
Purchases of Federal Home Loan Bank stock	(234,843,000)	(110,638,000)	(10,887,000)
Death benefit proceeds from bank owned life insurance	716,000	2,005,000	470,000
Net (increase) decrease in loans	(473,341,000)	(783,353,000)	35,945,000
Proceeds from sales of loans previously held for investment	0	0	21,765,000
Proceeds from dispositions and sales of bank premises and equipment	0	0	278,000
Purchases of premises and equipment	(5,069,000)	(6,432,000)	(4,851,000)
Proceeds from sales of other real estate and other repossessed assets	1,933,000	23,000	32,000
Net Cash Used in Investing Activities:	(290,572,000)	(651,861,000)	(615,290,000)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits	13,939,000	(48,469,000)	510,077,000
(Decrease) increase in federal funds purchased and securities sold under agreements to repurchase	(14,646,000)	622,344,000	(63,107,000)
Proceeds from other borrowings	300,000,000	0	0
Proceeds from issuance of subordinated debt, net	0	0	147,738,000
Redemption of subordinated debentures, net	0	0	(88,330,000)
Exercise of stock options	0	0	19,000
Retirement of restricted stock	(1,550,000)	(1,956,000)	(651,000)
Dividends paid	(38,071,000)	(37,334,000)	(27,119,000)
Net Cash Provided by Financing Activities:	259,672,000	534,585,000	478,627,000
Net increase (decrease) in cash and cash equivalents	84,705,000	7,420,000	(41,560,000)
Cash and cash equivalents, beginning of year	235,950,000	228,530,000	270,090,000
Cash and cash equivalents, end of year	320,655,000	235,950,000	228,530,000
Supplemental schedule of non-cash investing and financing activities:
Cash paid during the period for income taxes	28,546,000	37,227,000	29,111,000
Cash paid during the period for interest	199,204,000	52,110,000	23,372,000
Transfer of debt securities to held to maturity at fair value	0	0	494,164,000
Transfer of loans to loans held for sale	0	0	21,689,000
Right-of-use asset obtained in exchange for new operating lease liabilities	573,000	1,158,000	717,000
Non-cash assets acquired:
Federal Home Loan Bank stock	0	1,247,000	0
Investment securities available for sale	0	217,774,000	0
Investment securities held to maturity	0	124,485,000	0
Loans held for sale	0	4,620,000	0
Loans	0	1,095,266,000	0
Fixed assets	0	13,748,000	0
Operating lease right-of-use assets, net	0	12,991,000	0
Goodwill and other intangible assets, net	0	124,570,000	0
Bank owned life insurance	0	37,580,000	0
Other assets	0	8,820,000	0
Total non-cash assets acquired	0	1,641,101,000	0
Liabilities assumed:
Deposits	0	1,650,613,000	0
Subordinated debt	0	14,734,000	0
Operating lease liabilities	0	12,991,000	0
Other liabilities	0	3,257,000	0
Total liabilities assumed	0	1,681,595,000	0
Common stock issued for acquisitions	$ 0	$ 285,742,000	$ 0