Loans - Schedule of Amortized Cost Basis of Non-accrual Loans by Class of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financing receivable nonaccrual status
Non-accrual with no allowance	$ 106,686	$ 142,079
Non-accrual with allowance	306,751	356,264
BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	92,080	120,246
Non-accrual with allowance	275,744	338,463
Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	14,606	21,833
Non-accrual with allowance	31,007	17,801
Mortgage
Financing receivable nonaccrual status
Non-accrual with no allowance	54,920	60,034
Non-accrual with allowance	84,553	85,761
Mortgage \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	54,106	59,302
Non-accrual with allowance	75,134	73,071
Mortgage \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	814	732
Non-accrual with allowance	9,419	12,690
Commercial \| Commercial multi-family
Financing receivable nonaccrual status
Non-accrual with no allowance	2,288	8,137
Non-accrual with allowance	6,643	611
Commercial \| Commercial multi-family \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	0	112
Commercial \| Commercial multi-family \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	2,288	8,137
Non-accrual with allowance	6,643	499
Commercial \| Commercial real estate Non-owner occupied
Financing receivable nonaccrual status
Non-accrual with no allowance	30,522	38,387
Non-accrual with allowance	2,444	4,325
Commercial \| Commercial real estate Non-owner occupied \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	23,597	31,408
Non-accrual with allowance	2,419	4,284
Commercial \| Commercial real estate Non-owner occupied \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	6,925	6,979
Non-accrual with allowance	25	41
Commercial \| Commercial real estate Owner occupied
Financing receivable nonaccrual status
Non-accrual with no allowance	7,012	16,576
Non-accrual with allowance	17,227	7,991
Commercial \| Commercial real estate Owner occupied \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	6,523	16,576
Non-accrual with allowance	8,851	7,991
Commercial \| Commercial real estate Owner occupied \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	489	0
Non-accrual with allowance	8,376	0
Commercial \| Commercial and industrial
Financing receivable nonaccrual status
Non-accrual with no allowance	4,090	12,230
Non-accrual with allowance	140,862	178,182
Commercial \| Commercial and industrial \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	0	6,245
Non-accrual with allowance	138,389	177,669
Commercial \| Commercial and industrial \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	4,090	5,985
Non-accrual with allowance	2,473	513
Leasing
Financing receivable nonaccrual status
Non-accrual with no allowance	660	771
Non-accrual with allowance	6,522	8,408
Leasing \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	660	771
Non-accrual with allowance	6,522	8,408
Leasing \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance		0
Non-accrual with allowance		0
Consumer \| HELOCs
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	3,320	2,796
Consumer \| HELOCs \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance		0
Non-accrual with allowance		0
Consumer \| HELOCs \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	3,320	2,796
Consumer \| Personal
Financing receivable nonaccrual status
Non-accrual with no allowance	3,577	3,314
Non-accrual with allowance	13,779	16,782
Consumer \| Personal \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	3,577	3,314
Non-accrual with allowance	13,028	15,549
Consumer \| Personal \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	751	1,233
Consumer \| Auto
Financing receivable nonaccrual status
Non-accrual with no allowance	2,871	2,252
Non-accrual with allowance	28,603	49,948
Consumer \| Auto \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	2,871	2,252
Non-accrual with allowance	28,603	49,948
Consumer \| Auto \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	0	0
Consumer \| Other
Financing receivable nonaccrual status
Non-accrual with no allowance	746	378
Non-accrual with allowance	2,798	1,460
Consumer \| Other \| BPPR
Financing receivable nonaccrual status
Non-accrual with no allowance	746	378
Non-accrual with allowance	2,798	1,431
Consumer \| Other \| Popular U.S.
Financing receivable nonaccrual status
Non-accrual with no allowance	0	0
Non-accrual with allowance	$ 0	$ 29