Investment Securities - Gross Unrealized Losses on Available-for-sale Securities and the Related Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 223,002	$ 318,639
Less than 12 months, unrealized losses	(4,022)	(9,576)
More than 12 months, fair value	433,457	342,354
More than 12 months, unrealized losses	(30,133)	(32,550)
Fair Value	656,459	660,993
Unrealized Losses	(34,155)	(42,126)
U.S. Treasury and government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	212,079	282,319
Less than 12 months, unrealized losses	(3,947)	(8,876)
More than 12 months, fair value	375,028	302,840
More than 12 months, unrealized losses	(28,313)	(30,546)
Fair Value	587,107	585,159
Unrealized Losses	(32,260)	(39,422)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	4,936	13,216
Less than 12 months, unrealized losses	(62)	(43)
More than 12 months, fair value	4,471	4,394
More than 12 months, unrealized losses	(551)	(631)
Fair Value	9,407	17,610
Unrealized Losses	(613)	(674)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	5,987	22,309
Less than 12 months, unrealized losses	(13)	(632)
More than 12 months, fair value	53,156	35,120
More than 12 months, unrealized losses	(1,251)	(1,373)
Fair Value	59,143	57,429
Unrealized Losses	(1,264)	(2,005)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	0	795
Less than 12 months, unrealized losses	0	(25)
More than 12 months, fair value	802	0
More than 12 months, unrealized losses	(18)	0
Fair Value	802	795
Unrealized Losses	$ (18)	$ (25)