| Cover Page Cover Page | Oct. 18, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Oct. 18, 2019 |
| Entity Registrant Name | PACIFIC PREMIER BANCORP INC |
| Entity Central Index Key | 0001028918 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-22193 |
| Entity Tax Identification Number | 33-0743196 |
| 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 |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | PPBI |
| Security Exchange Name | NASDAQ |
