Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.4
SECURITIES AND OTHER INVESTMENTS (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value $ 536,063 $ 183,814
Less than 12 Months, Unrealized Losses (2,235) (2,542)
More than 12 Months, Fair Value 1,666,987 1,696,552
More than 12 Months, Unrealized Losses (313,266) (403,433)
Total, Fair Value 2,203,050 1,880,366
Unrealized Losses, Total (315,501) (405,975)
US Government Agencies Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 6,689 1,935
Less than 12 Months, Unrealized Losses (6) (2)
More than 12 Months, Fair Value 737 1,286
More than 12 Months, Unrealized Losses (8) (25)
Total, Fair Value 7,426 3,221
Unrealized Losses, Total (14) (27)
US States and Political Subdivisions Debt Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 25 6,560
Less than 12 Months, Unrealized Losses 0 (322)
More than 12 Months, Fair Value 473,201 444,056
More than 12 Months, Unrealized Losses (101,487) (129,381)
Total, Fair Value 473,226 450,616
Unrealized Losses, Total (101,487) (129,703)
Corporate Bond Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 37,988 8,620
Less than 12 Months, Unrealized Losses (75) (27)
More than 12 Months, Fair Value 98,125 145,655
More than 12 Months, Unrealized Losses (4,132) (9,292)
Total, Fair Value 136,113 154,275
Unrealized Losses, Total (4,207) (9,319)
Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 83,707 56,155
Less than 12 Months, Unrealized Losses (343) (1,547)
More than 12 Months, Fair Value 183,430 181,990
More than 12 Months, Unrealized Losses (41,368) (45,241)
Total, Fair Value 267,137 238,145
Unrealized Losses, Total (41,711) (46,788)
Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 407,654 110,544
Less than 12 Months, Unrealized Losses (1,811) (644)
More than 12 Months, Fair Value 911,494 923,565
More than 12 Months, Unrealized Losses (166,271) (219,494)
Total, Fair Value 1,319,148 1,034,109
Unrealized Losses, Total (168,082) (220,138)
Agency Securities [Member] | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 44,536 31,291
Less than 12 Months, Unrealized Losses (166) (359)
More than 12 Months, Fair Value 161,001 160,880
More than 12 Months, Unrealized Losses (39,640) (44,319)
Total, Fair Value 205,537 192,171
Unrealized Losses, Total (39,806) (44,678)
Agency Securities [Member] | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 359,095 104,477
Less than 12 Months, Unrealized Losses (1,564) (546)
More than 12 Months, Fair Value 886,626 895,714
More than 12 Months, Unrealized Losses (163,960) (216,208)
Total, Fair Value 1,245,721 1,000,191
Unrealized Losses, Total (165,524) (216,754)
Non-agency | Commercial Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 39,171 24,864
Less than 12 Months, Unrealized Losses (177) (1,188)
More than 12 Months, Fair Value 22,429 21,110
More than 12 Months, Unrealized Losses (1,728) (922)
Total, Fair Value 61,600 45,974
Unrealized Losses, Total (1,905) (2,110)
Non-agency | Residential Mortgage-Backed Securities [Member]    
Debt and Equity Securities, FV-NI [Line Items]    
Less than 12 months, Fair Value 48,559 6,067
Less than 12 Months, Unrealized Losses (247) (98)
More than 12 Months, Fair Value 24,868 27,851
More than 12 Months, Unrealized Losses (2,311) (3,286)
Total, Fair Value 73,427 33,918
Unrealized Losses, Total $ (2,558) $ (3,384)