{"cik":1282977,"taxonomy":"us-gaap","tag":"OperatingIncomeLoss","label":"Operating Income (Loss)","description":"The net result for the period of deducting operating expenses from operating revenues.","entityName":"GREENHILL & CO., INC.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":45773000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":7200000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q1"},{"start":"2016-04-01","end":"2016-06-30","val":30700000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q2"},{"start":"2016-07-01","end":"2016-09-30","val":20100000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":91108000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2016-01-01","end":"2016-12-31","val":91108000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":33200000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":2900000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-01-01","end":"2017-03-31","val":2993000,"accn":"0001282977-18-000006","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-10"},{"start":"2017-01-01","end":"2017-03-31","val":2900000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":13358000,"accn":"0001282977-18-000008","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":10400000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-04-01","end":"2017-06-30","val":10365000,"accn":"0001282977-18-000008","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":10400000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":3953000,"accn":"0001282977-18-000010","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-06"},{"start":"2017-07-01","end":"2017-09-30","val":-9400000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-07-01","end":"2017-09-30","val":-9405000,"accn":"0001282977-18-000010","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-06"},{"start":"2017-07-01","end":"2017-09-30","val":-9400000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":6900000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-01-01","end":"2017-12-31","val":6900000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2017-01-01","end":"2017-12-31","val":6900000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":3000000,"accn":"0001282977-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"start":"2017-10-01","end":"2017-12-31","val":3000000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":19016000,"accn":"0001282977-18-000006","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-10"},{"start":"2018-01-01","end":"2018-03-31","val":19000000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2018-01-01","end":"2018-03-31","val":19016000,"accn":"0001282977-19-000017","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-10"},{"start":"2018-01-01","end":"2018-03-31","val":19000000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":38472000,"accn":"0001282977-18-000008","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":38472000,"accn":"0001282977-19-000023","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-05"},{"start":"2018-04-01","end":"2018-06-30","val":19456000,"accn":"0001282977-18-000008","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":19500000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2018-04-01","end":"2018-06-30","val":19456000,"accn":"0001282977-19-000023","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-05"},{"start":"2018-04-01","end":"2018-06-30","val":19500000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":59196000,"accn":"0001282977-18-000010","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-06"},{"start":"2018-01-01","end":"2018-09-30","val":59196000,"accn":"0001282977-19-000028","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":20724000,"accn":"0001282977-18-000010","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-06"},{"start":"2018-07-01","end":"2018-09-30","val":20700000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2018-07-01","end":"2018-09-30","val":20724000,"accn":"0001282977-19-000028","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":20700000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":80868000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2018-01-01","end":"2018-12-31","val":80868000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"start":"2018-01-01","end":"2018-12-31","val":80868000,"accn":"0001282977-21-000010","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-26","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":21600000,"accn":"0001282977-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-01"},{"start":"2018-10-01","end":"2018-12-31","val":21600000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":-14261000,"accn":"0001282977-19-000017","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-10"},{"start":"2019-01-01","end":"2019-03-31","val":-14300000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"start":"2019-01-01","end":"2019-03-31","val":-14261000,"accn":"0001282977-20-000027","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-08","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-20629000,"accn":"0001282977-19-000023","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-05"},{"start":"2019-01-01","end":"2019-06-30","val":-20629000,"accn":"0001282977-20-000034","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-6368000,"accn":"0001282977-19-000023","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":-6400000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"start":"2019-04-01","end":"2019-06-30","val":-6368000,"accn":"0001282977-20-000034","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":4576000,"accn":"0001282977-19-000028","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":4576000,"accn":"0001282977-20-000039","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-09"},{"start":"2019-07-01","end":"2019-09-30","val":25205000,"accn":"0001282977-19-000028","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":25200000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"start":"2019-07-01","end":"2019-09-30","val":25205000,"accn":"0001282977-20-000039","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-09","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":45843000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"start":"2019-01-01","end":"2019-12-31","val":45843000,"accn":"0001282977-21-000010","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-26"},{"start":"2019-01-01","end":"2019-12-31","val":45843000,"accn":"0001282977-22-000005","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":41300000,"accn":"0001282977-20-000006","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-2671000,"accn":"0001282977-20-000027","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-08"},{"start":"2020-01-01","end":"2020-03-31","val":-2671000,"accn":"0001282977-21-000025","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-10","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-17781000,"accn":"0001282977-20-000034","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-17781000,"accn":"0001282977-21-000031","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":-15110000,"accn":"0001282977-20-000034","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":-15110000,"accn":"0001282977-21-000031","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-24862000,"accn":"0001282977-20-000039","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-09"},{"start":"2020-01-01","end":"2020-09-30","val":-24862000,"accn":"0001282977-21-000037","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08"},{"start":"2020-07-01","end":"2020-09-30","val":-7081000,"accn":"0001282977-20-000039","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-09"},{"start":"2020-07-01","end":"2020-09-30","val":-7081000,"accn":"0001282977-21-000037","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":55248000,"accn":"0001282977-21-000010","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-26"},{"start":"2020-01-01","end":"2020-12-31","val":55248000,"accn":"0001282977-22-000005","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28"},{"start":"2020-01-01","end":"2020-12-31","val":55248000,"accn":"0001282977-23-000012","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":7225000,"accn":"0001282977-21-000025","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-10"},{"start":"2021-01-01","end":"2021-03-31","val":7225000,"accn":"0001282977-22-000018","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-1964000,"accn":"0001282977-21-000031","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-1964000,"accn":"0001282977-22-000036","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-08"},{"start":"2021-04-01","end":"2021-06-30","val":-9189000,"accn":"0001282977-21-000031","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":-9189000,"accn":"0001282977-22-000036","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-08","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":28398000,"accn":"0001282977-21-000037","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08"},{"start":"2021-01-01","end":"2021-09-30","val":28398000,"accn":"0001282977-22-000057","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-08"},{"start":"2021-07-01","end":"2021-09-30","val":30362000,"accn":"0001282977-21-000037","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08"},{"start":"2021-07-01","end":"2021-09-30","val":30362000,"accn":"0001282977-22-000057","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-08","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":71257000,"accn":"0001282977-22-000005","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28"},{"start":"2021-01-01","end":"2021-12-31","val":71257000,"accn":"0001282977-23-000012","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-28","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-14528000,"accn":"0001282977-22-000018","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-14528000,"accn":"0001282977-23-000044","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-10","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-35401000,"accn":"0001282977-22-000036","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-08"},{"start":"2022-01-01","end":"2022-06-30","val":-35401000,"accn":"0001282977-23-000048","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-09"},{"start":"2022-04-01","end":"2022-06-30","val":-20873000,"accn":"0001282977-22-000036","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-08"},{"start":"2022-04-01","end":"2022-06-30","val":-20873000,"accn":"0001282977-23-000048","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-09","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-12421000,"accn":"0001282977-22-000057","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-08"},{"start":"2022-01-01","end":"2022-09-30","val":-12421000,"accn":"0001282977-23-000052","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09"},{"start":"2022-07-01","end":"2022-09-30","val":22980000,"accn":"0001282977-22-000057","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-08"},{"start":"2022-07-01","end":"2022-09-30","val":22980000,"accn":"0001282977-23-000052","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":20570000,"accn":"0001282977-23-000012","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-28","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-25819000,"accn":"0001282977-23-000044","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-10998000,"accn":"0001282977-23-000048","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":14821000,"accn":"0001282977-23-000048","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-43215000,"accn":"0001282977-23-000052","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09"},{"start":"2023-07-01","end":"2023-09-30","val":-32217000,"accn":"0001282977-23-000052","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09","frame":"CY2023Q3"}]}}