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Goodwill and Intangible Assets Disclosure [Line Items]

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The percentage of goodwill from two subsidiaries to total goodwill as of the balance sheet date if other than 100 percent.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial life.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Amount of fair value of reporting unit in excess of carrying amount.

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Goodwill and other intangible assets - Additional Information (Details) - USD ($)	3 Months Ended		7 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jul. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 15, 2021	Jul. 31, 2020
Goodwill and other intangible assets
Amortization Of Intangible Assets				$ 9,134,000	$ 6,397,000	$ 9,370,000
Goodwill on acquisition				$ 49,171,000
Changes in the carrying amount of goodwill	$ 0	$ 0			0
Goodwill impairment charge			$ 0
K2 Capital Group LLC
Goodwill and other intangible assets
Identifiable intangible assets							$ 2,887,000
Discounted cash flow approach \| Minimum
Goodwill and other intangible assets
Cost of equity discount rate	11.34%			11.34%
Discounted cash flow approach \| Maximum
Goodwill and other intangible assets
Cost of equity discount rate	15.13%			15.13%
Trademarks \| E-Loan
Goodwill and other intangible assets
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				$ 5,400,000
Identifiable intangible assets	$ 700,000	6,100,000		700,000	6,100,000
Customer relationship
Goodwill and other intangible assets
Finite-Lived Customer Relationships, Gross	14,286,000	$ 26,397,000		14,286,000	$ 26,397,000
Customer relationship \| Credit card portfolio acquisition
Goodwill and other intangible assets
Amortization Of Intangible Assets				15,000,000.0
Finite-Lived Customer Relationships, Gross	$ 14,200,000			14,200,000
Banco Popular de Puerto Rico
Goodwill and other intangible assets
Step 1 Fair Value Excess Over Carrying Amount			$ 1,500,000,000					$ 282,000,000
Percentage excess of fair value of reporting unit over equity value			50.00%					9.00%
Goodwill on acquisition				0
Popular U.S.
Goodwill and other intangible assets
Step 1 Fair Value Excess Over Carrying Amount			$ 412,000,000					$ 215,000,000
Percentage excess of fair value of reporting unit over equity value			24.00%					13.00%
Goodwill on acquisition				49,171,000
Popular U.S. \| K2 Capital Group LLC
Goodwill and other intangible assets
Goodwill on acquisition				$ 49,000,000
Banco Popular de Puerto Rico and Popular Bank
Goodwill and other intangible assets
Percentage Of Goodwill			91.00%