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Securities - Schedule of Available-for-sale Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale securities
Fair Value, Less than 12 Months	$ 33,341	$ 31,829
Unrealized Losses, Less than 12 Months	94	286
Fair Value, 12 Months or Longer	946,219	1,011,691
Unrealized Losses, 12 Months or Longer	113,399	140,922
Fair Value	979,560	1,043,520
Unrealized Losses	113,493	141,208
U.S. Treasuries
Available-for-sale securities
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or Longer	67,465	65,663
Unrealized Losses, 12 Months or Longer	3,305	5,009
Fair Value	67,465	65,663
Unrealized Losses	3,305	5,009
Obligations of U.S. Government sponsored entities
Available-for-sale securities
Fair Value, Less than 12 Months	0	14,453
Unrealized Losses, Less than 12 Months	0	110
Fair Value, 12 Months or Longer	201,802	220,913
Unrealized Losses, 12 Months or Longer	16,328	22,167
Fair Value	201,802	235,366
Unrealized Losses	16,328	22,277
Obligations of U.S. states and political subdivisions
Available-for-sale securities
Fair Value, Less than 12 Months	0	10,572
Unrealized Losses, Less than 12 Months	0	106
Fair Value, 12 Months or Longer	75,370	69,601
Unrealized Losses, 12 Months or Longer	7,079	7,971
Fair Value	75,370	80,173
Unrealized Losses	7,079	8,077
U.S. Government agencies
Available-for-sale securities
Fair Value, Less than 12 Months	27,779	1,145
Unrealized Losses, Less than 12 Months	63	4
Fair Value, 12 Months or Longer	39,010	43,764
Unrealized Losses, 12 Months or Longer	3,735	4,740
Fair Value	66,789	44,909
Unrealized Losses	3,798	4,744
U.S. Government sponsored entities
Available-for-sale securities
Fair Value, Less than 12 Months	5,562	5,659
Unrealized Losses, Less than 12 Months	31	66
Fair Value, 12 Months or Longer	560,180	609,456
Unrealized Losses, 12 Months or Longer	82,844	100,829
Fair Value	565,742	615,115
Unrealized Losses	82,875	100,895
U.S. corporate debt securities
Available-for-sale securities
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or Longer	2,392	2,294
Unrealized Losses, 12 Months or Longer	108	206
Fair Value	2,392	2,294
Unrealized Losses	$ 108	$ 206

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