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SECURITIES AND OTHER INVESTMENTS (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | $ 202,548 | $ 205,602
Less than 12 Months, Unrealized Losses | (3,775) | (3,700)
More than 12 Months, Fair Value | 1,782,125 | 1,862,395
More than 12 Months, Unrealized Losses | (408,115) | (382,167)
Total, Fair Value | 1,984,673 | 2,067,997
Unrealized Losses, Total | (411,890) | (385,867)
U.S. government and agency securities |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Losses | 0 | 0
More than 12 Months, Fair Value | 1,808 | 1,980
More than 12 Months, Unrealized Losses | (33) | (34)
Total, Fair Value | 1,808 | 1,980
Unrealized Losses, Total | (33) | (34)
Obligations of states and political subdivisions |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 14,061 | 11,758
Less than 12 Months, Unrealized Losses | (2,301) | (2,090)
More than 12 Months, Fair Value | 443,557 | 455,931
More than 12 Months, Unrealized Losses | (121,612) | (109,361)
Total, Fair Value | 457,618 | 467,689
Unrealized Losses, Total | (123,913) | (111,451)
Corporate and other bonds |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 78,546 | 89,450
Less than 12 Months, Unrealized Losses | (348) | (531)
More than 12 Months, Fair Value | 144,239 | 144,155
More than 12 Months, Unrealized Losses | (17,092) | (19,243)
Total, Fair Value | 222,785 | 233,605
Unrealized Losses, Total | (17,440) | (19,774)
Commercial |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 49,823 | 35,665
Less than 12 Months, Unrealized Losses | (805) | (547)
More than 12 Months, Fair Value | 182,426 | 208,435
More than 12 Months, Unrealized Losses | (43,560) | (42,599)
Total, Fair Value | 232,249 | 244,100
Unrealized Losses, Total | (44,365) | (43,146)
Residential |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 60,118 | 68,729
Less than 12 Months, Unrealized Losses | (321) | (532)
More than 12 Months, Fair Value | 1,010,095 | 1,051,894
More than 12 Months, Unrealized Losses | (225,818) | (210,930)
Total, Fair Value | 1,070,213 | 1,120,623
Unrealized Losses, Total | (226,139) | (211,462)
Agency | Commercial |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 35,287 | 35,665
Less than 12 Months, Unrealized Losses | (548) | (547)
More than 12 Months, Fair Value | 140,475 | 143,657
More than 12 Months, Unrealized Losses | (42,061) | (40,634)
Total, Fair Value | 175,762 | 179,322
Unrealized Losses, Total | (42,609) | (41,181)
Agency | Residential |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 43,155 | 59,707
Less than 12 Months, Unrealized Losses | (273) | (491)
More than 12 Months, Fair Value | 974,263 | 1,011,809
More than 12 Months, Unrealized Losses | (220,469) | (205,144)
Total, Fair Value | 1,017,418 | 1,071,516
Unrealized Losses, Total | (220,742) | (205,635)
Non-agency | Commercial |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 14,536 | 0
Less than 12 Months, Unrealized Losses | (257) | 0
More than 12 Months, Fair Value | 41,951 | 64,778
More than 12 Months, Unrealized Losses | (1,499) | (1,965)
Total, Fair Value | 56,487 | 64,778
Unrealized Losses, Total | (1,756) | (1,965)
Non-agency | Residential |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 16,963 | 9,022
Less than 12 Months, Unrealized Losses | (48) | (41)
More than 12 Months, Fair Value | 35,832 | 40,085
More than 12 Months, Unrealized Losses | (5,349) | (5,786)
Total, Fair Value | 52,795 | 49,107
Unrealized Losses, Total | $ (5,397) | $ (5,827)

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