Segment Reporting - Additional Information (Details)	3 Months Ended
Mar. 31, 2026 USD ($) units	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Segment Reporting Information [Line Items]
Number Of Operating Segments \| units	2
Factors Used To Identify Entitys Reportable Segments	Banco Popular de Puerto Rico and Popular U.S. Management determined the reportable segments based on the internal reporting used to evaluate performance and to assess where to allocate resources.
Net Revenue	$ 835,806,000	$ 757,658,000
Assets	76,131,018,000	74,038,606,000	$ 75,348,267,000
US
Segment Reporting Information [Line Items]
Net Revenue	139,663,000	127,216,000
Assets	16,278,568,000		16,101,705,000
Other
Segment Reporting Information [Line Items]
Net Revenue	28,072,000	20,481,000
Assets	1,341,723,000		1,291,097,000
Banco Popular de Puerto Rico \| US
Segment Reporting Information [Line Items]
Net Revenue	21,500,000	26,300,000
Assets	1,400,000,000		1,400,000,000
Bank loan origination	0	6,000,000
Banco Popular de Puerto Rico \| US \| Commercial multi-family
Segment Reporting Information [Line Items]
Assets	102,000,000		102,000,000
Banco Popular de Puerto Rico \| US \| Commercial real estate loans
Segment Reporting Information [Line Items]
Assets	413,000,000		435,000,000
Banco Popular de Puerto Rico \| US \| Commercial and industrial
Segment Reporting Information [Line Items]
Assets	735,000,000		714,000,000
Banco Popular de Puerto Rico \| US \| Unsecured personal loans
Segment Reporting Information [Line Items]
Assets	31,000,000		41,000,000
Banco Popular de Puerto Rico \| Other
Segment Reporting Information [Line Items]
Net Revenue	13,600,000	$ 11,800,000
Assets	$ 1,100,000,000		$ 1,000,000,000.0

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