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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)

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