SEGMENT INFORMATION (Tables)	6 Months Ended
SEGMENT INFORMATION (Tables)	Jun. 30, 2023
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, 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 earnings 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) Quarter ended June 30, 2022: Interest income $ 33,205 $ 73,487 $ 47,513 $ 27,143 $ 21,081 $ 6,196 $ 208,625 Net (charge) credit for transfer of funds (6,870) 34,039 (16,134) (10,705) (330) - - Interest expense - (5,129) - (4,972) (2,063) (275) (12,439) Net interest income 26,335 102,397 31,379 11,466 18,688 5,921 196,186 Provision for credit losses - (benefit) expense (3,605) 15,055 (470) (35) (1,678) 736 10,003 Non-interest income (loss) 4,167 19,783 4,448 (51) 678 1,916 30,941 Direct non-interest expenses 5,681 40,546 9,048 905 8,237 6,765 71,182 Segment income $ 28,426 $ 66,579 $ 27,249 $ 10,545 $ 12,807 $ 336 $ 145,942 Average earnings assets $ 2,243,188 $ 2,860,086 $ 3,624,176 $ 7,769,754 $ 2,036,108 $ 370,590 $ 18,903,902 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 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 $ 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 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, 2022 Interest income $ 66,276 $ 143,924 $ 94,540 $ 49,327 $ 39,938 $ 12,474 $ 406,479 Net (charge) credit for transfer of funds (14,162) 58,321 (22,746) (20,654) (759) - - Interest expense - (10,302) - (9,798) (4,009) (560) (24,669) Net interest income 52,114 191,943 71,794 18,875 35,170 11,914 381,810 Provision for credit losses - (benefit) expense (7,308) 26,199 (17,092) (423) (5,225) 50 (3,799) Non-interest income (loss) 9,419 40,246 9,002 (163) 1,422 3,873 63,799 Direct non-interest expenses 12,587 79,817 17,907 1,790 16,716 13,738 142,555 Segment income $ 56,254 $ 126,173 $ 79,981 $ 17,345 $ 25,101 $ 1,999 $ 306,853 Average earnings assets $ 2,268,279 $ 2,810,062 $ 3,662,720 $ 7,931,699 $ 2,050,791 $ 374,358 $ 19,097,909
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, 2023 2022 2023 2022 (In thousands) Net income: Total income for segments $ 141,013 $ 145,942 $ 286,759 $ 306,853 Other operating expenses (1) 40,074 37,144 83,187 72,430 Income before income taxes 100,939 108,798 203,572 234,423 Income tax expense 30,284 34,103 62,219 77,128 Total consolidated net income $ 70,655 $ 74,695 $ 141,353 $ 157,295 Average assets: Total average earning assets for segments $ 17,930,901 $ 18,903,902 $ 17,820,826 $ 19,097,909 Average non-earning assets 857,677 820,924 852,680 890,043 Total consolidated average assets $ 18,788,578 $ 19,724,826 $ 18,673,506 $ 19,987,952 (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.