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Securities - Schedule of Credit Quality Indicators of Held-To-Maturity Securities at Amortized Cost (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]    
Total $ 1,888,537 $ 1,945,795
U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 283,851 287,259
State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 1,056,869 1,088,499
Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 47,232 51,325
Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 308,725 323,649
Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 29,975 32,329
Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 161,885 162,734
AAA    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 639,265 693,051
AAA | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
AAA | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 253,333 285,748
AAA | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 47,232 51,325
AAA | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 308,725 323,649
AAA | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 29,975 32,329
AAA | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
AA    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 979,197 1,022,426
AA | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 283,851 287,259
AA | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 689,162 730,907
AA | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
AA | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
AA | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
AA | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 6,184 4,260
A    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 123,812 81,489
A | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
A | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 112,192 69,658
A | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
A | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
A | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
A | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 11,620 11,831
BBB    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 77,947 80,383
BBB | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BBB | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 2,182 2,186
BBB | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BBB | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BBB | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BBB | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 75,765 78,197
BB    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 4,546 4,556
BB | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BB | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BB | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BB | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BB | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
BB | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 4,546 4,556
Not Rated    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 63,770 63,890
Not Rated | U.S. Treasury and federal agencies    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
Not Rated | State and municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
Not Rated | Federal agency collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
Not Rated | Federal agency mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
Not Rated | Private labeled mortgage-backed pools    
Schedule of Held-to-Maturity Securities [Line Items]    
Total 0 0
Not Rated | Corporate notes    
Schedule of Held-to-Maturity Securities [Line Items]    
Total $ 63,770 $ 63,890