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Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available for sale |  |
Amortized cost within one year | $ 448 | $ 5,505
Amortized cost one to five years | 148,408 | 100,301
Amortized cost for five to ten years | 217,000 | 167,764
Amortized cost for after ten years | 95,631 | 195,984
Amortized cost, available for sale | 461,487 | 469,554
Total available for sale investment securities, amortized cost | 616,744 | 634,615
Fair value within one year | 447 | 5,408
Fair value for one to five years | 135,879 | 89,650
Fair value for five to ten years | 184,540 | 141,203
Fair value for after ten years | 84,456 | 170,113
Fair value, available for sale | 405,322 | 406,374
Fair Value | 541,170 | 547,251
Held to maturity |  |
Within one year, amortized cost | 49,801 | 33,483
One to five years, amortized cost | 309,583 | 225,957
Five to ten years, amortized cost | 360,008 | 350,843
After ten years, amortized cost | 783,213 | 928,209
Amortized cost, held to maturity | 1,502,605 | 1,538,492
Investment securities, held to maturity | 1,888,537 | 1,945,795
Within one year, fair value | 49,143 | 33,169
One to five years, fair value | 294,552 | 216,354
five to ten years, fair value | 316,813 | 304,067
After ten years, fair value | 641,525 | 768,927
Fair value, held to maturity | 1,302,033 | 1,322,517
Fair value, held to maturity, mortgage obligations and backed pools | 1,640,447 | 1,668,758
Federal agency collateralized mortgage obligations |  |
Available for sale |  |
Amortized cost, available for sale, mortgage obligations and backed pools | 3,413 | 3,931
Fair Value | 3,152 | 3,580
Held to maturity |  |
Investment securities, held to maturity | 47,232 | 51,325
Fair value, held to maturity, mortgage obligations and backed pools | 40,791 | 43,479
Federal agency mortgage-backed pools |  |
Available for sale |  |
Amortized cost, available for sale, mortgage obligations and backed pools | 151,844 | 161,130
Fair Value | 132,696 | 137,297
Held to maturity |  |
Investment securities, held to maturity | 308,725 | 323,649
Fair value, held to maturity, mortgage obligations and backed pools | 271,084 | 275,028
Private labeled mortgage-backed pools |  |
Held to maturity |  |
Investment securities, held to maturity | 29,975 | 32,329
Fair value, held to maturity, mortgage obligations and backed pools | $ 26,539 | $ 27,734

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