| Document and Entity Information | Apr. 22, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001286225 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Apr. 22, 2021 |
| Entity Registrant Name | RealPage, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-34846 |
| Entity Tax Identification Number | 75-2788861 |
| Entity Address, Address Line One | 2201 Lakeside Boulevard |
| Entity Address, City or Town | Richardson |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75082-4305 |
| City Area Code | (972) |
| Local Phone Number | 820-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value |
| Trading Symbol | RP |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
