SEGMENT INFORMATION (Tables)	9 Months Ended
SEGMENT INFORMATION (Tables)	Sep. 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 September 30, 2024: Interest income $ 31,997 $ 96,478 $ 74,065 $ 28,099 $ 37,049 $ 6,987 $ 274,675 Net (charge) credit for transfer of funds (18,407) 93,854 (54,133) (18,687) (2,627) - - Interest expense - (43,747) - (11,046) (15,415) (2,403) (72,611) Net interest income (loss) 13,590 146,585 19,932 (1,634) 19,007 4,584 202,064 Provision for credit losses - (benefit) expense (4,982) 28,003 (6,524) (36) (1,010) (206) 15,245 Non-interest income 3,408 21,214 4,714 238 951 1,977 32,502 Direct non-interest expenses 5,983 44,984 10,659 1,039 9,242 7,005 78,912 Segment income (loss) $ 15,997 $ 94,812 $ 20,511 $ (2,399) $ 11,726 $ (238) $ 140,409 Average earning assets $ 2,128,619 $ 3,516,590 $ 4,041,142 $ 5,790,707 $ 2,172,677 $ 386,687 $ 18,036,422 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Quarter ended September 30, 2023: Interest income $ 31,208 $ 90,976 $ 68,138 $ 32,146 $ 33,560 $ 7,377 $ 263,405 Net (charge) credit for transfer of funds (12,929) 96,836 (54,926) (27,817) (1,164) - - Interest expense - (40,746) - (8,384) (12,647) (1,900) (63,677) Net interest income (loss) 18,279 147,066 13,212 (4,055) 19,749 5,477 199,728 Provision for credit losses - (benefit) expense (3,288) 13,707 (7,235) 32 873 307 4,396 Non-interest income (loss) 3,021 20,170 4,468 (3) 847 1,793 30,296 Direct non-interest expenses 5,201 43,431 9,658 958 8,535 6,647 74,430 Segment income (loss) $ 19,387 $ 110,098 $ 15,257 $ (5,048) $ 11,188 $ 316 $ 151,198 Average earning assets $ 2,127,641 $ 3,336,158 $ 3,769,370 $ 6,382,276 $ 2,041,662 $ 406,499 $ 18,063,606 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Nine-Month Period Ended September 30, 2024 Interest income $ 94,886 $ 286,412 $ 219,091 $ 85,069 $ 108,227 $ 21,740 $ 815,425 Net (charge) credit for transfer of funds (51,141) 289,577 (169,304) (61,979) (7,153) - - Interest expense - (129,188) - (36,107) (44,935) (6,983) (217,213) Net interest income (loss) 43,745 446,801 49,787 (13,017) 56,139 14,757 598,212 Provision for credit losses - (benefit) expense (15,036) 69,497 (10,610) (45) (4,452) (337) 39,017 Non-interest income 10,088 65,083 14,031 419 2,686 6,216 98,523 Direct non-interest expenses 18,988 132,317 29,353 3,094 27,444 20,618 231,814 Segment income (loss) $ 49,881 $ 310,070 $ 45,075 $ (15,647) $ 35,833 $ 692 $ 425,904 Average earnings assets $ 2,123,814 $ 3,492,399 $ 4,036,197 $ 5,844,335 $ 2,126,742 $ 406,248 $ 18,029,735 Mortgage Banking Consumer (Retail) Banking Commercial and Corporate Banking Treasury and Investments United States Operations Virgin Islands Operations Total (In thousands) Nine-Month Period Ended September 30, 2023 Interest income $ 94,720 $ 261,139 $ 195,837 $ 89,140 $ 96,772 $ 20,397 $ 758,005 Net (charge) credit for transfer of funds (33,293) 260,715 (154,752) (70,095) (2,575) - - Interest expense - (94,447) - (26,547) (33,828) (2,755) (157,577) Net interest income (loss) 61,427 427,407 41,085 (7,502) 60,369 17,642 600,428 Provision for credit losses - (benefit) expense (7,623) 42,600 (2,096) 7 9,545 (305) 42,128 Non-interest income 9,157 62,425 16,788 1,837 2,849 6,029 99,085 Direct non-interest expenses 15,821 126,872 28,363 2,828 25,341 20,203 219,428 Segment income (loss) $ 62,386 $ 320,360 $ 31,606 $ (8,500) $ 28,332 $ 3,773 $ 437,957 Average earnings assets $ 2,147,521 $ 3,251,286 $ 3,751,359 $ 6,321,540 $ 2,049,281 $ 381,655 $ 17,902,642
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 September 30, Nine-Month Period Ended September 30, 2024 2023 2024 2023 (In thousands) Net income: Total income for segments $ 140,409 $ 151,198 $ 425,904 $ 437,957 Other operating expenses (1) 44,023 42,208 130,726 125,395 Income before income taxes 96,386 108,990 295,178 312,562 Income tax expense 22,659 26,968 72,155 89,187 Total consolidated net income $ 73,727 $ 82,022 $ 223,023 $ 223,375 Average assets: Total average earning assets for segments $ 18,036,422 $ 18,063,606 $ 18,029,735 $ 17,902,642 Average non-earning assets 846,952 832,374 845,662 845,837 Total consolidated average assets $ 18,883,374 $ 18,895,980 $ 18,875,397 $ 18,748,479 (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.