| Cover | May 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to Current Report on Form 8-K/A is being filed with the Securities and Exchange Commission (the “SEC”) solely to amend and supplement Item 9.01 of the Current Report on Form 8-K (the “Original 8-K”) filed by Pacific Premier Bancorp, Inc. (“PPBI”) on June 1, 2020, reporting under Item 2.01 the completion of the previously announced merger (the “Merger”) between Pacific Premier Bank, a California-chartered commercial bank and wholly-owned subsidiary of PPBI, and Opus Bank (“Opus”). Under Item 9.01(b) of the Original 8-K, PPBI stated that unaudited pro forma combined consolidated financial information as of and for the three-month period ended March 31, 2020 would be filed by amendment no later than 71 days following the date that the Original 8-K was required to be filed. No other changes have been made to the Original 8-K. |
| Document Period End Date | May 28, 2020 |
| Entity File Number | 000-22193 |
| Entity Registrant Name | PACIFIC PREMIER BANCORP, INC. |
| Entity Central Index Key | 0001028918 |
| Entity Tax Identification Number | 33-0743196 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 17901 Von Karman Avenue |
| Entity Address, Address Line Two | Suite 1200 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92614 |
| City Area Code | 949 |
| Local Phone Number | 864-8000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | PPBI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
