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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Equity securities gains and losses [Table Text Block]
The following table represents a summary of the gains and losses recognized within non-interest income and non-interest expense within the Consolidated Statements of Income that relate to equity securities for the periods indicated:
Years Ended December 31
202520242023
(Dollars in thousands)
Net gains recognized during the period on equity securities$403 $423 $1,180 
Less: net gains recognized during the period on equity securities sold during the period256 877 197 
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date$147 $(454)$983 
Schedule of Available-for-sale Securities Reconciliation
The following table summarizes the amortized cost, allowance for credit losses, and fair value of available for sale securities and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at the dates indicated:

 December 31, 2025December 31, 2024
 Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value		Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value
 (Dollars in thousands)
U.S. government agency securities$228,697 $— $(10,025)$— $218,672 $229,452 $— $(19,792)$— $209,660 
U.S. treasury securities485,388 32 (14,336)— 471,084 628,017 — (36,016)— 592,001 
Agency mortgage-backed securities790,764 4,430 (22,231)— 772,963 415,918 25 (37,782)— 378,161 
Agency collateralized mortgage obligations273,321 784 (4,529)— 269,576 31,168 1 (2,174)— 28,995 
Non-taxable municipal securities12,478 80 — — 12,558 197 — (3)— 194 
Taxable municipal securities217,574 2,976 (30)— 220,520 — — — — — 
Pooled trust preferred securities issued by banks and insurers 1,120 — (78)— 1,042 1,180 — (85)— 1,095 
Small business administration pooled securities42,480 — (4,648)— 37,832 48,032 — (7,194)— 40,838 
Total available for sale securities$2,051,822 $8,302 $(55,877)$— $2,004,247 $1,353,964 $26 $(103,046)$— $1,250,944 
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value
The following tables show the gross unrealized losses and fair value of the Company’s available for sale securities in an unrealized loss position as of the dates indicated. These available for sale securities are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position:
  December 31, 2025
  Less than 12 months12 months or longerTotal
# of
holdings		Fair ValueUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair ValueUnrealized
Losses
  (Dollars in thousands)
U.S. government agency securities9 $— $— $218,672 $(10,025)$218,672 $(10,025)
U.S. treasury securities10 — — 464,514 (14,336)464,514 (14,336)
Agency mortgage-backed securities106 178,837 (911)237,923 (21,320)416,760 (22,231)
Agency collateralized mortgage obligations54 175,697 (3,216)23,265 (1,313)198,962 (4,529)
Taxable municipal securities8 6,792 (30)— — 6,792 (30)
Pooled trust preferred securities issued by banks and insurers1 — — 1,042 (78)1,042 (78)
Small business administration pooled securities8 — — 37,832 (4,648)37,832 (4,648)
Total impaired available for sale securities196 $361,326 $(4,157)$983,248 $(51,720)$1,344,574 $(55,877)

December 31, 2024
Less than 12 months12 months or longerTotal
# of
holdings		Fair ValueUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair ValueUnrealized
Losses
U.S. government agency securities9 $— $— $209,660 $(19,792)$209,660 $(19,792)
U.S. treasury securities13 — — 592,001 (36,016)592,001 (36,016)
Agency mortgage-backed securities117 127,152 (2,867)249,098 (34,915)376,250 (37,782)
Agency collateralized mortgage obligations11 1,153 (4)26,890 (2,170)28,043 (2,174)
Non-taxable municipal securities1 194 (3)— — 194 (3)
Pooled trust preferred securities issued by banks and insurers1 — — 1,095 (85)1,095 (85)
Small business administration pooled securities8 — — 40,838 (7,194)40,838 (7,194)
Total impaired available for sale securities160 $128,499 $(2,874)$1,119,582 $(100,172)$1,248,081 $(103,046)
Debt Securities, Held-to-maturity
The following table summarizes the amortized cost, fair value and allowance for credit losses of held to maturity securities and the corresponding amounts of gross unrealized gains and losses at the dates indicated:

 December 31, 2025December 31, 2024
 Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value		Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value
 (Dollars in thousands)
U.S. treasury securities$100,872 $— $(3,748)$— $97,124 $100,791 $— $(7,769)$— $93,022 
Agency mortgage-backed securities694,903 339 (35,827)— 659,415 788,470 90 (62,198)— 726,362 
Agency collateralized mortgage obligations370,698 — (44,900)— 325,798 422,827 — (65,143)— 357,684 
Small business administration pooled securities112,554 183 (4,341)— 108,396 122,868 — (8,135)— 114,733 
Total held to maturity securities$1,279,027 $522 $(88,816)$— $1,190,733 $1,434,956 $90 $(143,245)$— $1,291,801 
Schedule of Contractual Maturities of Securities A schedule of the contractual maturities of securities available for sale and securities held to maturity at December 31, 2025 is presented below:
Due in one year or lessDue after one year to five yearsDue after five to ten yearsDue after ten yearsTotal
Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
(Dollars in thousands)
Available for sale securities
U.S. government agency securities$67,581 $66,465 $161,116 $152,207 $— $— $— $— $228,697 $218,672 
U.S. treasury securities245,330 241,528 240,058 229,556 — — — — 485,388 471,084 
Agency mortgage-backed securities23,941 23,460 186,900 183,182 46,100 42,489 533,823 523,832 790,764 772,963 
Agency collateralized mortgage obligations— — 4,420 4,454 1,877 1,773 267,024 263,349 273,321 269,576 
Non-taxable municipal securities1,588 1,589 7,800 7,806 3,090 3,163 — — 12,478 12,558 
Taxable municipal securities— — 104,445 105,598 111,671 113,439 1,458 1,483 217,574 220,520 
Pooled trust preferred securities issued by banks and insurers — — — — — — 1,120 1,042 1,120 1,042 
Small business administration pooled securities— — — — 10,560 10,017 31,920 27,815 42,480 37,832 
Total available for sale securities$338,440 $333,042 $704,739 $682,803 $173,298 $170,881 $835,345 $817,521 $2,051,822 $2,004,247 
Held to maturity securities
U.S. Treasury securities$— $— $99,878 $96,252 $994 $872 $— $— $100,872 $97,124 
Agency mortgage-backed securities78,780 78,001 346,118 332,207 139,401 125,995 130,604 123,212 694,903 659,415 
Agency collateralized mortgage obligations25,468 25,323 34,664 32,923 13,019 11,971 297,547 255,581 370,698 325,798 
Small business administration pooled securities— — — — 5,226 4,967 107,328 103,429 112,554 108,396 
Total held to maturity securities$104,248 $103,324 $480,660 $461,382 $158,640 $143,805 $535,479 $482,222 $1,279,027 $1,190,733 
Total$442,688 $436,366 $1,185,399 $1,144,185 $331,938 $314,686 $1,370,824 $1,299,743 $3,330,849 $3,194,980