CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net Income	$ 128,181	$ 138,257	$ 73,447
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	21,106	(1,376)	56,718
Deferred Income Taxes and Tax Credits	(2,011)	1,432	(8,217)
Depreciation and amortization	10,552	11,442	11,653
Net gains on securities and other assets	(11,556)	(22,273)	(18,807)
Net amortization of premiums and discounts on securities	2,027	4,772	6,183
Income from increase in cash surrender value of bank owned life insurance	(5,261)	(6,105)	(6,288)
Mortgage loans originated for sale	(195,105)	(390,940)	(410,715)
Proceeds from Sale of Mortgage Loans Held-for-sale	198,302	419,574	408,877
(Increase) decrease in interest receivable	(6,846)	5,885	(10,735)
Increase (decrease) in interest payable	1,172	(412)	(879)
(Decrease) increase in income taxes payable	(4,561)	10,664	(887)
Other—net	15,413	(5,874)	5,349
Net cash provided by operating activities	151,413	165,046	105,699
Proceeds from maturities and redemptions	145,589	433,910	472,282
Transactions with securities held to maturity:
Proceeds from Sale and Maturity of Held-to-maturity Securities	0	0	0
Proceeds from maturities and redemptions	79,613	120,728	118,905
Purchases	(200)	(361,734)	(85,679)
Transactions with securities available for sale:
Proceeds from sale	0	0	0
Purchases	0	(676,861)	(411,178)
Purchases of FHLB stock	(20,632)	(4,453)	(22,231)
Proceeds from the redemption of FHLB stock	7,056	3,342	26,766
Proceeds from Sale of Other Investments	0	500	0
Proceeds from bank owned life insurance	5,337	7,357	1,444
Proceeds from the sale of loans	68,625	76,414	41,141
Proceeds from sales of other assets	8,609	7,798	5,531
Net increase in loans	(871,578)	(161,667)	(622,504)
Purchases of premises and equipment	(11,207)	(10,639)	(7,615)
Net cash used in investing activities	(588,788)	(565,305)	(483,138)
Financing Activities
Net increase in federal funds purchased	0	0	0
Net increase (decrease) in other short-term borrowings	234,379	20,942	(84,480)
Net increase in deposits	23,007	543,947	761,398
Repayments of other long-term debt	(712)	(50,685)	(659)
Repayments of Long-term Capital Lease Obligations	496	464	430
Dividends paid	(44,578)	(43,611)	(42,982)
Proceeds from reissuance of treasury stock	245	222	222
Purchase of treasury stock	(15,598)	(31,301)	(20,905)
Net cash provided by financing activities	196,247	439,050	612,164
Net (decrease) increase in cash and cash equivalents	(241,128)	38,791	234,725
Cash and cash equivalents at January 1	395,372	356,581	121,856
Cash and cash equivalents at December 31	$ 154,244	$ 395,372	$ 356,581