Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 35,429	$ 27,981	$ 93,408
Items not requiring (providing) cash
Provision for (recovery of) credit losses	5,389	2,459	(1,816)
Depreciation and amortization	10,331	10,938	10,754
Share based compensation	4,586	3,586	2,475
Amortization of mortgage servicing rights	1,971	1,032	2,345
Impairment (recovery) of mortgage servicing rights	0	0	(2,594)
Net amortization of premiums and discounts on securities	8,407	10,069	12,148
Deferred income taxes	(17,000)	(3,322)	2,177
(Gain) loss on sale of investment securities	39,140	32,052	0
Gain on sale of mortgage loans	(4,215)	(4,323)	(7,165)
Proceeds from sales of loans	435,522	145,922	225,928
Loans originated for sale	(499,688)	(138,430)	(215,174)
Gain on cash value life insurance	(1,300)	(3,709)	(2,594)
Gain on other real estate owned	(450)	(300)	(722)
Net change in:
Interest receivable	(1,037)	(3,416)	(9,157)
Interest payable	(11,112)	16,869	3,145
Other assets	(9,698)	13,199	(13,964)
Other liabilities	10,093	(21,671)	(4,814)
Net cash provided by operating activities	6,368	88,936	94,380
Investing Activities
Purchases of securities available for sale	0	(1,525)	(180,198)
Proceeds from sales of securities available for sale	293,138	439,285	0
Proceeds from maturities, calls and principal repayments of securities available for sale	16,712	29,408	69,113
Purchases of securities held to maturity	(312)	(10,141)	(430,457)
Proceeds from maturities of securities held to maturity	71,649	80,201	72,968
Net change in interest earning time deposits	1,470	607	1,970
Purchase of FHLB stock	(19,317)	(7,832)	(2,435)
Redemption of FHLB stock	0	0	198
Purchase of loans	(240,020)	(124,946)	(55,195)
Net change in loans	(217,055)	(140,510)	(448,284)
Proceeds on the sale of OREO and repossessed assets	2,000	2,981	5,263
Premises and equipment expenditures	(5,084)	(7,775)	(6,429)
Purchases of bank owned life insurance	0	0	(50,000)
Proceeds from bank owned life insurance	44,043	69,765	3,554
Net cash received in branch acquisition	0	0	0
Net cash provided by (used in) investing activities	(52,776)	329,518	(1,019,932)
Financing Activities
Net change in deposits	(64,241)	(192,881)	54,783
Proceeds from borrowings	512,759	866,099	1,178,746
Repayment of borrowings	(563,523)	(654,157)	(755,608)
Net change in repurchase agreements	(46,118)	(1,841)	7,072
Net settlement of share awards	(1,371)	(1,221)	(1,824)
Proceeds from sale of SERP shares	4,146	0	0
Exercise of stock options	0	0	145
Repurchase of outstanding stock	0	0	0
Repayment of subordinated notes	0	(3,132)	0
Dividends paid on common stock	(28,328)	(28,311)	(27,765)
Net cash provided by (used in) financing activities	(186,676)	(15,444)	455,549
Net Change in Cash and Cash Equivalents	(233,084)	403,010	(470,003)
Cash and Cash Equivalents, Beginning of Period	526,515	123,505	593,508
Cash and Cash Equivalents, End of Period	293,431	526,515	123,505
Additional Supplemental Information
Interest paid	178,891	119,692	33,370
Income taxes paid	10,710	2,137	802
Transfer of loans to other real estate and repossessed assets	2,690	3,299	2,009
Transfer of loans held for investment to loans held for sale	87,638
Transfer of premises to other real estate	0	0	1,479
Transfer of available for sale securities to held to maturity securities	0	0	120,881
Redemption of cash value of life insurance, not settled	0	43,962	0
Cash dividends declared, not paid	7,081	7,156	7,122
Qualified affordable housing investments obtained in exchange for funding commitments	$ 0	$ 14,491	$ 0