XML 111 R100.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	$ 1	$ 1
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	2,244,031	2,346,864
Other Borrowings, Fair Value Disclosure	124,434	123,116
Securities available-for-sale, at fair value	2,244,031	2,346,864
Credit-Link Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Borrowings, Fair Value Disclosure	124,434	123,116
Agency residential CMOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	278,260	284,334
Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	109,354	108,416
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	33,057	28,083
Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	241,343	253,306
SBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	12,388	13,739
Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	281,962	267,232
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)		4,968
Private label commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	18,076	20,813
Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	150,286	158,412
Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	17,444	19,952
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants		3,689
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants	3,557	3,689
Interest rate and economic contracts	10,727	8,309
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	2,244,031
Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	1,101,861	1,187,609
Fair Value, Measurements, Recurring | Agency residential CMOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	278,260	284,334
Fair Value, Measurements, Recurring | Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	109,354	108,416
Fair Value, Measurements, Recurring | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	33,057	28,083
Fair Value, Measurements, Recurring | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	241,343	253,306
Fair Value, Measurements, Recurring | SBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	12,388	13,739
Fair Value, Measurements, Recurring | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	281,962	267,232
Fair Value, Measurements, Recurring | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)		4,968
Fair Value, Measurements, Recurring | Private label commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	18,076	20,813
Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	150,286	158,412
Fair Value, Measurements, Recurring | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	17,444	19,952
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants	0	0
Interest rate and economic contracts	0	0
Equity Securities, FV-NI	1	1
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	4,968
Other Borrowings	0	0
Fair Value, Measurements, Recurring | Level 1 | Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Agency residential CMOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | SBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)		4,968
Fair Value, Measurements, Recurring | Level 1 | Private label commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants	0	0
Interest rate and economic contracts	10,727	8,309
Equity Securities, FV-NI	0	0
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	2,229,912	2,301,647
Other Borrowings	0	0
Fair Value, Measurements, Recurring | Level 2 | Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	1,101,861	1,187,609
Fair Value, Measurements, Recurring | Level 2 | Agency residential CMOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	278,260	284,334
Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	109,354	108,416
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	33,057	28,083
Fair Value, Measurements, Recurring | Level 2 | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	241,343	253,306
Fair Value, Measurements, Recurring | Level 2 | SBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	12,388	13,739
Fair Value, Measurements, Recurring | Level 2 | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	267,843	226,983
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)		0
Fair Value, Measurements, Recurring | Level 2 | Private label commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	18,076	20,813
Fair Value, Measurements, Recurring | Level 2 | Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	150,286	158,412
Fair Value, Measurements, Recurring | Level 2 | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	17,444	19,952
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity warrants	3,557	3,689
Interest rate and economic contracts	0	0
Equity Securities, FV-NI	0	0
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	14,119	40,249
Other Borrowings	124,434	123,116
Fair Value, Measurements, Recurring | Level 3 | Government agency and government-sponsored enterprise pass through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Agency residential CMOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | SBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	14,119	40,249
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)		0
Fair Value, Measurements, Recurring | Level 3 | Private label commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Private Label Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value, net of allowance for credit losses (amortized cost of $2,613,901 and $2,699,255, respectively)	$ 0	$ 0

X

- Definition

Other Borrowings, Fair Value Disclosure

+ References

No definition available.

+ Details

Name:	pacw_OtherBorrowingsFairValueDisclosure
Namespace Prefix:	pacw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Securities Available For Sale Including Covered Securities

+ References

No definition available.

+ Details

Name:	pacw_SecuritiesAvailableForSaleIncludingCoveredSecurities
Namespace Prefix:	pacw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of 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 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 4: 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_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of securities received as collateral against derivative assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-12

+ Details

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

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483467/210-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

+ Details

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

X

- Definition

The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

+ Details

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

X

- Definition

Fair value portion of warrants not settleable in cash classified as equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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

X

- Details

Name:	us-gaap_DebtInstrumentAxis=pacw_CreditLinkNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
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:

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
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: