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

Represents the discounts from face amounts of loans covered and non covered that are being amortized into income as an adjustment to yield.

No definition available.

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

Represents the amount before allowance and before deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts and other discounts, if any, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans and leases covered under loss sharing agreements.

No definition available.

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

Represents the percentage of aggregate gross carrying amount of covered and non-covered loans and leases receivable.

No definition available.

Name:	pacw_PercentageOfCoveredAndNonCoveredLoansAndLeasesReceivable
Namespace Prefix:	pacw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums over and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans and leases covered under loss sharing agreements.

No definition available.