XML 71 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available-for-sale securities:
Assets measured at fair value on a recurring basis	$ 3,070,782	$ 2,276,417
Assets
Assets measured at fair value on a nonrecurring basis	13,996	15,351
Specific reserves related to impaired loans	2,119	1,451
Derivative assets
Available-for-sale securities:
Assets measured at fair value on a recurring basis	13,606	9,752
Loans held for sale – fair value option
Available-for-sale securities:
Assets measured at fair value on a recurring basis	1,875,515	1,795,294
Derivative liabilities
Liabilities
Derivatives	12,673	10,074
Impaired loans, net of specific reserves
Assets
Assets measured at fair value on a nonrecurring basis	12,588	13,902
Specific reserves related to impaired loans	2,119	1,451
Other real estate owned
Assets
Assets measured at fair value on a nonrecurring basis	1,408	1,449
Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	3,362
Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	493,257	183,458
Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	324,534	238,472
Available-for-sale Securities | Corporate notes
Available-for-sale securities:
Assets measured at fair value on a recurring basis	360,508	46,089
Available-for-sale Securities | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis		3,352
Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale securities:
Assets measured at fair value on a recurring basis	3,362	3,352
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative assets
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale – fair value option
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative liabilities
Liabilities
Derivatives	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans, net of specific reserves
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	3,362
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Corporate notes
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis		3,352
Significant Other Observable Inputs (Level 2)
Available-for-sale securities:
Assets measured at fair value on a recurring basis	3,067,337	2,273,005
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2) | Derivative assets
Available-for-sale securities:
Assets measured at fair value on a recurring basis	13,523	9,692
Significant Other Observable Inputs (Level 2) | Loans held for sale – fair value option
Available-for-sale securities:
Assets measured at fair value on a recurring basis	1,875,515	1,795,294
Significant Other Observable Inputs (Level 2) | Derivative liabilities
Liabilities
Derivatives	12,673	10,074
Significant Other Observable Inputs (Level 2) | Impaired loans, net of specific reserves
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2) | Other real estate owned
Assets
Assets measured at fair value on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2) | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	493,257	183,458
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	324,534	238,472
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Corporate notes
Available-for-sale securities:
Assets measured at fair value on a recurring basis	360,508	46,089
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis		0
Significant Unobservable Inputs (Level 3)
Available-for-sale securities:
Assets measured at fair value on a recurring basis	83	60
Assets
Assets measured at fair value on a nonrecurring basis	13,996	15,351
Significant Unobservable Inputs (Level 3) | Derivative assets
Available-for-sale securities:
Assets measured at fair value on a recurring basis	83	60
Significant Unobservable Inputs (Level 3) | Loans held for sale – fair value option
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Significant Unobservable Inputs (Level 3) | Derivative liabilities
Liabilities
Derivatives	0	0
Significant Unobservable Inputs (Level 3) | Impaired loans, net of specific reserves
Assets
Assets measured at fair value on a nonrecurring basis	12,588	13,902
Significant Unobservable Inputs (Level 3) | Other real estate owned
Assets
Assets measured at fair value on a nonrecurring basis	1,408	1,449
Significant Unobservable Inputs (Level 3) | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis	0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Corporate notes
Available-for-sale securities:
Assets measured at fair value on a recurring basis	$ 0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Equity securities
Available-for-sale securities:
Assets measured at fair value on a recurring basis		$ 0

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureRecurring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

+ Details

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

X

- Definition

Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: