Quarterly report pursuant to Section 13 or 15(d)

SECURITIES AND OTHER INVESTMENTS (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details)

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SECURITIES AND OTHER INVESTMENTS (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value $ 426,904 $ 205,602
Less than 12 Months, Unrealized Losses (4,722) (3,700)
More than 12 Months, Fair Value 1,742,539 1,862,395
More than 12 Months, Unrealized Losses (417,774) (382,167)
Total, Fair Value 2,169,443 2,067,997
Unrealized Losses, Total (422,496) (385,867)
US Government Agencies Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 63,583 0
Less than 12 Months, Unrealized Losses (49) 0
More than 12 Months, Fair Value 1,584 1,980
More than 12 Months, Unrealized Losses (29) (34)
Total, Fair Value 65,167 1,980
Unrealized Losses, Total (78) (34)
US States and Political Subdivisions Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 26,598 11,758
Less than 12 Months, Unrealized Losses (2,454) (2,090)
More than 12 Months, Fair Value 437,301 455,931
More than 12 Months, Unrealized Losses (128,637) (109,361)
Total, Fair Value 463,899 467,689
Unrealized Losses, Total (131,091) (111,451)
Corporate Bond Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 67,638 89,450
Less than 12 Months, Unrealized Losses (319) (531)
More than 12 Months, Fair Value 143,787 144,155
More than 12 Months, Unrealized Losses (17,250) (19,243)
Total, Fair Value 211,425 233,605
Unrealized Losses, Total (17,569) (19,774)
Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 84,514 35,665
Less than 12 Months, Unrealized Losses (1,017) (547)
More than 12 Months, Fair Value 184,427 208,435
More than 12 Months, Unrealized Losses (44,836) (42,599)
Total, Fair Value 268,941 244,100
Unrealized Losses, Total (45,853) (43,146)
Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 184,571 68,729
Less than 12 Months, Unrealized Losses (883) (532)
More than 12 Months, Fair Value 975,440 1,051,894
More than 12 Months, Unrealized Losses (227,022) (210,930)
Total, Fair Value 1,160,011 1,120,623
Unrealized Losses, Total (227,905) (211,462)
Agency Securities [Member] | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 49,908 35,665
Less than 12 Months, Unrealized Losses (195) (547)
More than 12 Months, Fair Value 143,907 143,657
More than 12 Months, Unrealized Losses (43,622) (40,634)
Total, Fair Value 193,815 179,322
Unrealized Losses, Total (43,817) (41,181)
Agency Securities [Member] | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 142,153 59,707
Less than 12 Months, Unrealized Losses (755) (491)
More than 12 Months, Fair Value 943,832 1,011,809
More than 12 Months, Unrealized Losses (222,299) (205,144)
Total, Fair Value 1,085,985 1,071,516
Unrealized Losses, Total (223,054) (205,635)
Non-agency | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 34,606 0
Less than 12 Months, Unrealized Losses (822) 0
More than 12 Months, Fair Value 40,520 64,778
More than 12 Months, Unrealized Losses (1,214) (1,965)
Total, Fair Value 75,126 64,778
Unrealized Losses, Total (2,036) (1,965)
Non-agency | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 42,418 9,022
Less than 12 Months, Unrealized Losses (128) (41)
More than 12 Months, Fair Value 31,608 40,085
More than 12 Months, Unrealized Losses (4,723) (5,786)
Total, Fair Value 74,026 49,107
Unrealized Losses, Total $ (4,851) $ (5,827)