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v3.23.1

Investments - Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Held-to-maturity [Abstract] |  |
Amortized Cost | $ 721,566 | $ 710,650
Gross Unrealized Gains | 5,309 | 2,484
Gross Unrealized Losses | (70,322) | (84,617)
Allowance for Credit Losses | (872) | (735)
Fair Value | 656,553 | 628,517
Securities held-to-maturity, net | 720,694 | 709,915
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 1,716,681 | 1,729,054
Gross Unrealized Gains | 727 | 481
Gross Unrealized Losses | (162,299) | (193,728)
Securities available-for-sale | 1,555,109 | 1,535,807
Obligations of U.S. Government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 289,560 | 266,090
Gross Unrealized Gains | 95 | 0
Gross Unrealized Losses | (23,950) | (28,305)
Securities available-for-sale | 265,705 | 237,785
Obligations of states and political subdivisions |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Amortized Cost | 541,345 | 529,012
Gross Unrealized Gains | 5,133 | 2,321
Gross Unrealized Losses | (54,232) | (65,347)
Fair Value | 492,246 | 465,986
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 503,883 | 507,842
Gross Unrealized Gains | 53 | 27
Gross Unrealized Losses | (73,243) | (90,425)
Securities available-for-sale | 430,693 | 417,444
Agency mortgage-backed securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Amortized Cost | 55,897 | 57,018
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (5,566) | (6,416)
Fair Value | 50,331 | 50,602
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 710,642 | 727,931
Gross Unrealized Gains | 557 | 453
Gross Unrealized Losses | (60,748) | (68,980)
Securities available-for-sale | 650,451 | 659,404
U.S. Treasury bills |  |
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 203,596 | 213,441
Gross Unrealized Gains | 22 | 1
Gross Unrealized Losses | (3,515) | (4,908)
Securities available-for-sale | 200,103 | 208,534
Corporate debt securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Amortized Cost | 124,324 | 124,620
Gross Unrealized Gains | 176 | 163
Gross Unrealized Losses | (10,524) | (12,854)
Fair Value | 113,976 | 111,929
Debt Securities, Available-for-sale [Abstract] |  |
Amortized Cost | 9,000 | 13,750
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (843) | (1,110)
Securities available-for-sale | $ 8,157 | $ 12,640

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