| Document and Entity Information | Oct. 07, 2019 |
| Cover page. | |
| Pre-commencement Issuer Tender Offer | false |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Written Communications | false |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 001-32514 |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Document Period End Date | Oct. 7, 2019 |
| Amendment Flag | false |
| Document Type | 8-K |
| Entity Registrant Name | DiamondRock Hospitality Co |
| Entity Address, Address Line One | 2 Bethesda Metro Center, Suite 1400 |
| Entity Address, City or Town | Bethesda |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 20814 |
| City Area Code | 240 |
| Local Phone Number | 744-1150 |
| Entity Central Index Key | 0001298946 |
| Entity Emerging Growth Company | false |
| Trading Symbol | DRH |
| Security Exchange Name | NYSE |
| Entity Tax Identification Number | 20-1180098 |
