XML 81 R54.htm IDEA: XBRL DOCUMENT v3.25.2

INVESTMENT SECURITIES - Credit Valuation Allowance for Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	$ 13,127	$ 5,069	$ 7,604	$ 3,952
Credit losses on securities for which credit losses were not previously recorded	528	466	528	631
Credit losses on previously impaired securities	2,189	242	9,204	1,057
Decrease in allowance for credit losses on previously impaired securities	(293)	(438)	(417)	(301)
Reduction due to sales and intent to sell	100	0	1,468	0
Allowance for credit losses on PCD debt securities	1,905	0	1,905	0
Debt securities, allowance for credit loss, ending balance	17,356	5,339	17,356	5,339
Asset-backed securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	353	450	362	483
Credit losses on securities for which credit losses were not previously recorded	400	0	400	0
Credit losses on previously impaired securities	0	0	16	0
Decrease in allowance for credit losses on previously impaired securities	(169)	(83)	(194)	(116)
Reduction due to sales and intent to sell	0	0	0	0
Allowance for credit losses on PCD debt securities	0	0	0	0
Debt securities, allowance for credit loss, ending balance	584	367	584	367
Corporate notes
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	12,774	4,619	7,135	3,469
Credit losses on securities for which credit losses were not previously recorded	128	466	128	631
Credit losses on previously impaired securities	2,189	242	9,188	1,057
Decrease in allowance for credit losses on previously impaired securities	(124)	(355)	(223)	(185)
Reduction due to sales and intent to sell	100	0	1,361	0
Allowance for credit losses on PCD debt securities	1,905	0	1,905	0
Debt securities, allowance for credit loss, ending balance	16,772	$ 4,972	16,772	$ 4,972
Private label CMOs
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	0		107
Credit losses on securities for which credit losses were not previously recorded	0		0
Credit losses on previously impaired securities	0		0
Decrease in allowance for credit losses on previously impaired securities	0		0
Reduction due to sales and intent to sell	0		107
Allowance for credit losses on PCD debt securities	0		0
Debt securities, allowance for credit loss, ending balance	$ 0		$ 0

X

- Definition

Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance For Credit Loss, Decrease On Previously Impaired Securities

+ References

No definition available.

+ Details

Name:	cubi_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossDecreaseOnPreviouslyImpairedSecurities
Namespace Prefix:	cubi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and beneficial interest, purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, excluding accrued interest, of credit loss expense on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with no credit loss previously recorded.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with previously recorded allowance and not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossSecuritiesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateNoteSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=cubi_PrivateLabelContractManufacturingOrganizationCMOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: