| Document and Entity Information | Sep. 17, 2019 |
| Cover [Abstract] | |
| Entity Registrant Name | PATRICK INDUSTRIES INC |
| Amendment Flag | false |
| Entity Central Index Key | 0000076605 |
| Document Type | 8-K |
| Document Period End Date | Sep. 17, 2019 |
| Entity Incorporation State Country Code | IN |
| Entity File Number | 000-03922 |
| Entity Tax Identification Number | 35-1057796 |
| Entity Address, Address Line One | 107 W. Franklin Street |
| Entity Address, Address Line Two | P.O. Box 638 |
| Entity Address, City or Town | Elkhart |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 46515 |
| City Area Code | (574) |
| Local Phone Number | 294-7511 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, no par value |
| Trading Symbol | PATK |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
