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
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)