SEGMENT INFORMATION (Tables)	6 Months Ended
SEGMENT INFORMATION (Tables)	Jun. 30, 2024
SEGMENT INFORMATION [Abstract]
Schedule Of Segment Reporting Information By Segment [Text Block]	The following tables present information about the reportable segments for the indicated periods: Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Quarter ended June 30, 2024: Interest income $ 31,446 $ 95,139 $ 72,914 $ 28,912 $ 36,413 $ 7,421 $ 272,245 Net (charge) credit for transfer of funds (17,114) 99,472 (57,987) (21,820) (2,551) - - Interest expense - (43,342) - (11,943) (14,978) (2,354) (72,617) Net interest income (loss) 14,332 151,269 14,927 (4,851) 18,884 5,067 199,628 Provision for credit losses - (benefit) expense (9,794) 26,076 (1,647) 60 (3,524) 434 11,605 Non-interest income 3,661 20,463 4,816 98 834 2,166 32,038 Direct non-interest expenses 6,300 44,688 8,355 984 9,092 7,022 76,441 Segment income (loss) $ 21,487 $ 100,968 $ 13,035 $ (5,797) $ 14,150 $ (223) $ 143,620 Average earning assets $ 2,116,306 $ 3,487,340 $ 4,045,222 $ 5,842,575 $ 2,119,230 $ 419,052 $ 18,029,725 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Quarter ended June 30, 2023: Interest income $ 31,605 $ 86,989 $ 65,356 $ 29,528 $ 32,098 $ 6,628 $ 252,204 Net (charge) credit for transfer of funds (10,245) 86,144 (52,423) (22,739) (737) - - Interest expense - (30,536) - (9,578) (11,671) (604) (52,389) Net interest income (loss) 21,360 142,597 12,933 (2,789) 19,690 6,024 199,815 Provision for credit losses - (benefit) expense (3,829) 13,669 7,675 (16) 4,017 714 22,230 Non-interest income 3,062 20,221 8,145 1,680 1,155 2,008 36,271 Direct non-interest expenses 5,533 41,814 9,340 923 8,502 6,731 72,843 Segment income (loss) $ 22,718 $ 107,335 $ 4,063 $ (2,016) $ 8,326 $ 587 $ 141,013 Average earning assets $ 2,144,340 $ 3,241,768 $ 3,770,463 $ 6,364,024 $ 2,038,621 $ 371,685 $ 17,930,901 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Six-Month Period Ended June 30, 2024 Interest income $ 62,889 $ 189,934 $ 145,026 $ 56,970 $ 71,178 $ 14,753 $ 540,750 Net (charge) credit for transfer of funds (32,734) 195,723 (115,171) (43,292) (4,526) - - Interest expense - (85,441) - (25,061) (29,520) (4,580) (144,602) Net interest income (loss) 30,155 300,216 29,855 (11,383) 37,132 10,173 396,148 Provision for credit losses - (benefit) expense (10,054) 41,494 (4,086) (9) (3,442) (131) 23,772 Non-interest income 6,680 43,869 9,317 181 1,735 4,239 66,021 Direct non-interest expenses 13,005 87,333 18,694 2,055 18,202 13,613 152,902 Segment income (loss) $ 33,884 $ 215,258 $ 24,564 $ (13,248) $ 24,107 $ 930 $ 285,495 Average earnings assets $ 2,121,386 $ 3,480,169 $ 4,033,698 $ 5,871,444 $ 2,103,523 $ 416,135 $ 18,026,355 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Six-Month Period Ended June 30, 2023 Interest income $ 63,512 $ 170,163 $ 127,699 $ 56,994 $ 63,212 $ 13,020 $ 494,600 Net (charge) credit for transfer of funds (20,364) 163,879 (99,826) (42,278) (1,411) - - Interest expense - (53,701) - (18,163) (21,181) (855) (93,900) Net interest income (loss) 43,148 280,341 27,873 (3,447) 40,620 12,165 400,700 Provision for credit losses - (benefit) expense (4,335) 28,893 5,139 (25) 8,672 (612) 37,732 Non-interest income 6,136 42,255 12,320 1,840 2,002 4,236 68,789 Direct non-interest expenses 10,620 83,441 18,705 1,870 16,806 13,556 144,998 Segment income (loss) $ 42,999 $ 210,262 $ 16,349 $ (3,452) $ 17,144 $ 3,457 $ 286,759 Average earnings assets $ 2,157,626 $ 3,208,146 $ 3,742,205 $ 6,290,669 $ 2,053,154 $ 369,026 $ 17,820,826
Reconciliation of the Reportable Segment Financial Information [Table Text Block]	The following table presents a reconciliation of the reportable segment financial information to the consolidated totals for the indicated periods: Quarter Ended June 30, Six-Month Period Ended June 30, 2024 2023 2024 2023 (In thousands) Net income: Total income for segments $ 143,620 $ 141,013 $ 285,495 $ 286,759 Other operating expenses (1) 42,241 40,074 86,703 83,187 Income before income taxes 101,379 100,939 198,792 203,572 Income tax expense 25,541 30,284 49,496 62,219 Total consolidated net income $ 75,838 $ 70,655 $ 149,296 $ 141,353 Average assets: Total average earning assets for segments $ 18,029,725 $ 17,930,901 $ 18,026,355 $ 17,820,826 Average non-earning assets 854,706 857,677 845,010 852,680 Total consolidated average assets $ 18,884,431 $ 18,788,578 $ 18,871,365 $ 18,673,506 (1) Expenses pertaining to corporate administrative functions that support the operating segment, but are not specifically attributable to or managed by any segment, are not included in the reported financial results of the operating segments. The unallocated corporate expenses include certain general and administrative expenses and related depreciation and amortization expenses.