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SECURITIES AND OTHER INVESTMENTS (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | $ 183,814 | $ 205,602
Less than 12 Months, Unrealized Losses | (2,542) | (3,700)
More than 12 Months, Fair Value | 1,696,552 | 1,862,395
More than 12 Months, Unrealized Losses | (403,433) | (382,167)
Total, Fair Value | 1,880,366 | 2,067,997
Unrealized Losses, Total | (405,975) | (385,867)
US Government Agencies Debt Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 1,935 | 0
Less than 12 Months, Unrealized Losses | (2) | 0
More than 12 Months, Fair Value | 1,286 | 1,980
More than 12 Months, Unrealized Losses | (25) | (34)
Total, Fair Value | 3,221 | 1,980
Unrealized Losses, Total | (27) | (34)
US States and Political Subdivisions Debt Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 6,560 | 11,758
Less than 12 Months, Unrealized Losses | (322) | (2,090)
More than 12 Months, Fair Value | 444,056 | 455,931
More than 12 Months, Unrealized Losses | (129,381) | (109,361)
Total, Fair Value | 450,616 | 467,689
Unrealized Losses, Total | (129,703) | (111,451)
Corporate Bond Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 8,620 | 89,450
Less than 12 Months, Unrealized Losses | (27) | (531)
More than 12 Months, Fair Value | 145,655 | 144,155
More than 12 Months, Unrealized Losses | (9,292) | (19,243)
Total, Fair Value | 154,275 | 233,605
Unrealized Losses, Total | (9,319) | (19,774)
Commercial Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 56,155 | 35,665
Less than 12 Months, Unrealized Losses | (1,547) | (547)
More than 12 Months, Fair Value | 181,990 | 208,435
More than 12 Months, Unrealized Losses | (45,241) | (42,599)
Total, Fair Value | 238,145 | 244,100
Unrealized Losses, Total | (46,788) | (43,146)
Residential Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 110,544 | 68,729
Less than 12 Months, Unrealized Losses | (644) | (532)
More than 12 Months, Fair Value | 923,565 | 1,051,894
More than 12 Months, Unrealized Losses | (219,494) | (210,930)
Total, Fair Value | 1,034,109 | 1,120,623
Unrealized Losses, Total | (220,138) | (211,462)
Agency Securities [Member] | Commercial Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 31,291 | 35,665
Less than 12 Months, Unrealized Losses | (359) | (547)
More than 12 Months, Fair Value | 160,880 | 143,657
More than 12 Months, Unrealized Losses | (44,319) | (40,634)
Total, Fair Value | 192,171 | 179,322
Unrealized Losses, Total | (44,678) | (41,181)
Agency Securities [Member] | Residential Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 104,477 | 59,707
Less than 12 Months, Unrealized Losses | (546) | (491)
More than 12 Months, Fair Value | 895,714 | 1,011,809
More than 12 Months, Unrealized Losses | (216,208) | (205,144)
Total, Fair Value | 1,000,191 | 1,071,516
Unrealized Losses, Total | (216,754) | (205,635)
Non-agency | Commercial Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 24,864 | 0
Less than 12 Months, Unrealized Losses | (1,188) | 0
More than 12 Months, Fair Value | 21,110 | 64,778
More than 12 Months, Unrealized Losses | (922) | (1,965)
Total, Fair Value | 45,974 | 64,778
Unrealized Losses, Total | (2,110) | (1,965)
Non-agency | Residential Mortgage-Backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, Fair Value | 6,067 | 9,022
Less than 12 Months, Unrealized Losses | (98) | (41)
More than 12 Months, Fair Value | 27,851 | 40,085
More than 12 Months, Unrealized Losses | (3,286) | (5,786)
Total, Fair Value | 33,918 | 49,107
Unrealized Losses, Total | $ (3,384) | $ (5,827)

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