Securities - Gross Unrealized Losses and Fair Value by Investment Category (Details) $ in Thousands	Mar. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security
Available for Sale:
Number of positions, Less than 12 Months | security	13	16
Fair Value, Less than 12 Months	$ 113,519	$ 95,216
Unrealized Losses, Less than 12 Months	$ (966)	$ (1,120)
Number of positions, 12 Months or More | security	118	122
Fair value, 12 Months or More	$ 605,867	$ 606,628
Unrealized Losses, 12 Months or More	$ (113,321)	$ (137,488)
Number of positions | security	131	138
Fair Value	$ 719,386	$ 701,844
Unrealized Losses	$ (114,287)	$ (138,608)
Held to Maturity:
Number of positions, Less than 12 Months | security	8	0
Fair Value, Less than 12 Months	$ 32,601	$ 0
Unrealized Losses, Less than 12 Months	$ (2,429)	$ 0
Number of positions, 12 Months or More | security	226	235
Fair value, 12 Months or More	$ 970,678	$ 1,000,874
Unrealized Losses, 12 Months or More	$ (96,007)	$ (123,603)
Number of positions | security	234	235
Fair Value	$ 1,003,279	$ 1,000,874
Unrealized Losses	$ (98,436)	$ (123,603)
Obligations of states and political subdivisions
Available for Sale:
Number of positions, Less than 12 Months | security	0	0
Fair Value, Less than 12 Months	$ 0	$ 0
Unrealized Losses, Less than 12 Months	$ 0	$ 0
Number of positions, 12 Months or More | security	7	7
Fair value, 12 Months or More	$ 13,040	$ 12,841
Unrealized Losses, 12 Months or More	$ (2,024)	$ (2,269)
Number of positions | security	7	7
Fair Value	$ 13,040	$ 12,841
Unrealized Losses	$ (2,024)	$ (2,269)
Held to Maturity:
Number of positions, Less than 12 Months | security	7	0
Fair Value, Less than 12 Months	$ 16,412	$ 0
Unrealized Losses, Less than 12 Months	$ (1,835)	$ 0
Number of positions, 12 Months or More | security	121	128
Fair value, 12 Months or More	$ 225,342	$ 240,394
Unrealized Losses, 12 Months or More	$ (39,823)	$ (42,491)
Number of positions | security	128	128
Fair Value	$ 241,754	$ 240,394
Unrealized Losses	$ (41,658)	$ (42,491)
Other debt securities
Available for Sale:
Number of positions, Less than 12 Months | security	3	2
Fair Value, Less than 12 Months	$ 43,019	$ 22,357
Unrealized Losses, Less than 12 Months	$ (259)	$ (218)
Number of positions, 12 Months or More | security	13	17
Fair value, 12 Months or More	$ 22,867	$ 30,801
Unrealized Losses, 12 Months or More	$ (1,523)	$ (2,437)
Number of positions | security	16	19
Fair Value	$ 65,886	$ 53,158
Unrealized Losses	$ (1,782)	$ (2,655)
Held to Maturity:
Number of positions, Less than 12 Months | security	0	0
Fair Value, Less than 12 Months	$ 0	$ 0
Unrealized Losses, Less than 12 Months	$ 0	$ 0
Number of positions, 12 Months or More | security	10	10
Fair value, 12 Months or More	$ 47,739	$ 49,603
Unrealized Losses, 12 Months or More	$ (3,066)	$ (4,080)
Number of positions | security	10	10
Fair Value	$ 47,739	$ 49,603
Unrealized Losses	$ (3,066)	$ (4,080)
Government agency mortgage backed securities | Residential mortgage backed securities:
Available for Sale:
Number of positions, Less than 12 Months | security	8	7
Fair Value, Less than 12 Months	$ 65,280	$ 11,051
Unrealized Losses, Less than 12 Months	$ (669)	$ (259)
Number of positions, 12 Months or More | security	34	34
Fair value, 12 Months or More	$ 140,351	$ 141,321
Unrealized Losses, 12 Months or More	$ (20,338)	$ (24,208)
Number of positions | security	42	41
Fair Value	$ 205,631	$ 152,372
Unrealized Losses	$ (21,007)	$ (24,467)
Held to Maturity:
Number of positions, Less than 12 Months | security	1	0
Fair Value, Less than 12 Months	$ 16,189	$ 0
Unrealized Losses, Less than 12 Months	$ (594)	$ 0
Number of positions, 12 Months or More | security	67	69
Fair value, 12 Months or More	$ 326,460	$ 347,154
Unrealized Losses, 12 Months or More	$ (16,987)	$ (25,251)
Number of positions | security	68	69
Fair Value	$ 342,649	$ 347,154
Unrealized Losses	$ (17,581)	$ (25,251)
Government agency mortgage backed securities | Commercial mortgage backed securities:
Available for Sale:
Number of positions, Less than 12 Months | security	1	2
Fair Value, Less than 12 Months	$ 2,412	$ 5,248
Unrealized Losses, Less than 12 Months	$ (35)	$ (122)
Number of positions, 12 Months or More | security	2	2
Fair value, 12 Months or More	$ 5,483	$ 5,375
Unrealized Losses, 12 Months or More	$ (514)	$ (629)
Number of positions | security	3	4
Fair Value	$ 7,895	$ 10,623
Unrealized Losses	$ (549)	$ (751)
Held to Maturity:
Number of positions, Less than 12 Months | security	0	0
Fair Value, Less than 12 Months	$ 0	$ 0
Unrealized Losses, Less than 12 Months	$ 0	$ 0
Number of positions, 12 Months or More | security	1	1
Fair value, 12 Months or More	$ 14,390	$ 14,002
Unrealized Losses, 12 Months or More	$ (2,565)	$ (2,958)
Number of positions | security	1	1
Fair Value	$ 14,390	$ 14,002
Unrealized Losses	$ (2,565)	$ (2,958)
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Available for Sale:
Number of positions, Less than 12 Months | security	0	3
Fair Value, Less than 12 Months	$ 0	$ 48,879
Unrealized Losses, Less than 12 Months	$ 0	$ (482)
Number of positions, 12 Months or More | security	37	37
Fair value, 12 Months or More	$ 319,460	$ 311,964
Unrealized Losses, 12 Months or More	$ (69,091)	$ (86,389)
Number of positions | security	37	40
Fair Value	$ 319,460	$ 360,843
Unrealized Losses	$ (69,091)	$ (86,871)
Held to Maturity:
Number of positions, Less than 12 Months | security	0	0
Fair Value, Less than 12 Months	$ 0	$ 0
Unrealized Losses, Less than 12 Months	$ 0	$ 0
Number of positions, 12 Months or More | security	18	18
Fair value, 12 Months or More	$ 320,055	$ 313,376
Unrealized Losses, 12 Months or More	$ (26,960)	$ (41,506)
Number of positions | security	18	18
Fair Value	$ 320,055	$ 313,376
Unrealized Losses	$ (26,960)	$ (41,506)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Available for Sale:
Number of positions, Less than 12 Months | security	1	2
Fair Value, Less than 12 Months	$ 2,808	$ 7,681
Unrealized Losses, Less than 12 Months	$ (3)	$ (39)
Number of positions, 12 Months or More | security	25	25
Fair value, 12 Months or More	$ 104,666	$ 104,326
Unrealized Losses, 12 Months or More	$ (19,831)	$ (21,556)
Number of positions | security	26	27
Fair Value	$ 107,474	$ 112,007
Unrealized Losses	$ (19,834)	$ (21,595)
Held to Maturity:
Number of positions, Less than 12 Months | security	0	0
Fair Value, Less than 12 Months	$ 0	$ 0
Unrealized Losses, Less than 12 Months	$ 0	$ 0
Number of positions, 12 Months or More | security	9	9
Fair value, 12 Months or More	$ 36,692	$ 36,345
Unrealized Losses, 12 Months or More	$ (6,606)	$ (7,317)
Number of positions | security	9	9
Fair Value	$ 36,692	$ 36,345
Unrealized Losses	$ (6,606)	$ (7,317)