CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 103,817	$ 95,733	$ 84,337
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	6,020	6,105	6,042
Provision for loan losses	9,375	1,077	14,770
Net loss on sale and write down of other real estate owned	96	67	0
Amortization of loan servicing rights	757	2,282	772
Net change in loan servicing rights valuation allowance	(715)	0	715
Loans originated for sale, including participations	(28,666)	(119,439)	(117,600)
Net gain on sales of loans	(1,028)	(4,376)	(4,510)
Proceeds from sale of loans, including participations	36,454	126,391	114,244
Net (gain) loss on sale of premises and equipment	7	43	86
Net (gain) loss on sales and calls of securities available-for-sale	(21)	(797)	(433)
Net securities amortization	6,342	4,959	3,998
Stock based compensation expense	7,811	7,158	1,790
Earnings on life insurance	(432)	(2,467)	(2,105)
Gain on life insurance	0	(415)	(730)
Tax benefit of stock award issuances	(514)	(330)	(71)
Net change:
Interest receivable and other assets	(10,711)	(1,852)	(6,315)
Interest payable and other liabilities	40,750	(371)	(7,762)
Total adjustments	65,525	18,035	2,891
Net cash from operating activities	169,342	113,768	87,228
Cash flows from investing activities:
Proceeds from sale of securities available- for-sale	25,332	13,964	8,018
Proceeds from maturities, calls and principal paydowns of securities available-for-sale	108,129	137,812	97,998
Proceeds from maturities, calls and principal paydowns of securities held-to-maturity	30	0	0
Purchases of securities available-for-sale	(315,272)	(835,001)	(216,478)
Purchase of life insurance	(10,808)	(711)	(10,409)
Net (increase) decrease in total loans	(427,097)	356,660	(587,377)
Proceeds from sales of land, premises and equipment	6	8	658
Purchases of land, premises and equipment	(4,821)	(6,167)	(5,719)
Proceeds from redemption of Federal Home Loan Bank stock	932	0	0
Purchases of Federal Home Loan Bank stock	(2,955)	0	0
Proceeds from sales of other real estate owned	0	946	0
Proceeds from life insurance	0	943	1,285
Net cash from investing activities	(626,524)	(331,546)	(712,024)
Cash flows from financing activities:
Net increase (decrease) in total deposits	(274,787)	698,602	902,986
Net increase (decrease) in short-term borrowings	22,000	(10,500)	10,500
Payments on short-term FHLB borrowings	0	0	(170,000)
Proceeds from short-term FHLB borrowings	275,000	0	0
Payments on long-term FHLB borrowings	(75,000)	0	0
Proceeds from long-term FHLB borrowings	0	0	75,000
Common dividends paid	(40,838)	(34,640)	(30,566)
Preferred dividends paid	(13)	(13)	(13)
Payments related to equity incentive plan	(1,780)	(1,914)	(2,137)
Purchase of treasury stock	(579)	(559)	(10,547)
Sales of treasury stock	221	115	119
Net cash from financing activities	(95,776)	651,091	775,342
Net change in cash and cash equivalents	(552,958)	433,313	150,546
Beginning balance	683,240	249,927	99,381
Ending balance	130,282	683,240	249,927
Cash paid during the year for:
Interest	36,113	18,471	35,740
Income taxes	20,580	25,947	19,355
Supplemental non-cash disclosures:
Loans transferred to other real estate owned	0	893	35
Property transferred to held for sale	0	0	0
Right-of-use assets obtained in exchange for lease liabilities	$ 1,612	$ 0	$ 0