Quarterly report [Sections 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, 2026
Dec. 31, 2025
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value $ 1,277,519 $ 536,063
Less than 12 Months, Unrealized Losses (10,925) (2,235)
More than 12 Months, Fair Value 1,575,988 1,666,987
More than 12 Months, Unrealized Losses (312,918) (313,266)
Total, Fair Value 2,853,507 2,203,050
Unrealized Losses, Total (323,843) (315,501)
US Government Agencies Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 33,795 6,689
Less than 12 Months, Unrealized Losses (139) (6)
More than 12 Months, Fair Value 893 737
More than 12 Months, Unrealized Losses (13) (8)
Total, Fair Value 34,688 7,426
Unrealized Losses, Total (152) (14)
US States and Political Subdivisions Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 7,827 25
Less than 12 Months, Unrealized Losses (403) 0
More than 12 Months, Fair Value 466,964 473,201
More than 12 Months, Unrealized Losses (100,152) (101,487)
Total, Fair Value 474,791 473,226
Unrealized Losses, Total (100,555) (101,487)
Corporate Bond Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 31,720 37,988
Less than 12 Months, Unrealized Losses (122) (75)
More than 12 Months, Fair Value 89,745 98,125
More than 12 Months, Unrealized Losses (2,628) (4,132)
Total, Fair Value 121,465 136,113
Unrealized Losses, Total (2,750) (4,207)
Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 142,976 83,707
Less than 12 Months, Unrealized Losses (1,498) (343)
More than 12 Months, Fair Value 178,164 183,430
More than 12 Months, Unrealized Losses (41,763) (41,368)
Total, Fair Value 321,140 267,137
Unrealized Losses, Total (43,261) (41,711)
Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 1,061,201 407,654
Less than 12 Months, Unrealized Losses (8,763) (1,811)
More than 12 Months, Fair Value 840,222 911,494
More than 12 Months, Unrealized Losses (168,362) (166,271)
Total, Fair Value 1,901,423 1,319,148
Unrealized Losses, Total (177,125) (168,082)
Agency Securities [Member] | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 73,165 44,536
Less than 12 Months, Unrealized Losses (572) (166)
More than 12 Months, Fair Value 144,318 161,001
More than 12 Months, Unrealized Losses (39,559) (39,640)
Total, Fair Value 217,483 205,537
Unrealized Losses, Total (40,131) (39,806)
Agency Securities [Member] | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 993,857 359,095
Less than 12 Months, Unrealized Losses (8,046) (1,564)
More than 12 Months, Fair Value 817,802 886,626
More than 12 Months, Unrealized Losses (166,152) (163,960)
Total, Fair Value 1,811,659 1,245,721
Unrealized Losses, Total (174,198) (165,524)
Non-agency | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 69,811 39,171
Less than 12 Months, Unrealized Losses (926) (177)
More than 12 Months, Fair Value 33,846 22,429
More than 12 Months, Unrealized Losses (2,204) (1,728)
Total, Fair Value 103,657 61,600
Unrealized Losses, Total (3,130) (1,905)
Non-agency | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 67,344 48,559
Less than 12 Months, Unrealized Losses (717) (247)
More than 12 Months, Fair Value 22,420 24,868
More than 12 Months, Unrealized Losses (2,210) (2,311)
Total, Fair Value 89,764 73,427
Unrealized Losses, Total $ (2,927) $ (2,558)