Investment Securities - Gross Unrealized Losses on Available-for-sale Securities and the Related Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 9,991	$ 13,906
Less than 12 months, unrealized losses	(9)	(94)
More than 12 months, fair value	443,982	579,138
More than 12 months, unrealized losses	(11,834)	(24,729)
Fair Value	453,973	593,044
Unrealized Losses	(11,843)	(24,823)
U.S. Treasury and government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	9,991	9,997
Less than 12 months, unrealized losses	(9)	(3)
More than 12 months, fair value	434,211	528,574
More than 12 months, unrealized losses	(11,598)	(23,962)
Fair Value	444,202	538,571
Unrealized Losses	(11,607)	(23,965)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	4,783	6,599
More than 12 months, unrealized losses	(229)	(418)
Fair Value	4,783	6,599
Unrealized Losses	(229)	(418)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	0	3,909
Less than 12 months, unrealized losses	0	(91)
More than 12 months, fair value	4,988	43,149
More than 12 months, unrealized losses	(7)	(345)
Fair Value	4,988	47,058
Unrealized Losses	$ (7)	(436)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value		0
Less than 12 months, unrealized losses		0
More than 12 months, fair value		816
More than 12 months, unrealized losses		(4)
Fair Value		816
Unrealized Losses		$ (4)