Retirement Plan	12 Months Ended
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Retirement Plan	Note 13 — Retirement Plan In the U.S., the Company sponsors a qualified defined contribution plan (the “Retirement Plan”) covering all eligible employees of G&Co. The Retirement Plan provides for both employee contributions in accordance with Section 401(k) of the Internal Revenue Code, and employer discretionary profit sharing contributions, subject to statutory limits. Participants may contribute up to 75% of eligible compensation, as defined. The Company incurred costs of $0.3 million, $0.2 million and $0.2 million for contributions to the Retirement Plan for the years ended December 31, 2015, 2014 and 2013, respectively. There was $0.2 million related to contributions due to the Retirement Plan included in compensation payable at each of December 31, 2015 and 2014. GCI also operates a defined contribution pension fund for its employees. The assets of the pension fund are held separately in an independently administered fund. For the years ended December 31, 2015, 2014 and 2013, GCI incurred costs for the funding of pension contributions of approximately $0.5 million, $0.6 million and $0.6 million, respectively. At December 31, 2015 and 2014, there were no amounts related to contributions due to the defined contribution pension fund included in compensation payable. Greenhill Australia is required by Australian law to contribute compulsory superannuation on employees' gross earnings, generally at a rate of 9%, subject to an annual limit per employee. Superannuation is a defined contribution plan in which retirement benefits are determined by the contribution accumulated over the working life plus investment earnings within the fund less expenses. Greenhill Australia incurred costs for the funding of pension contributions of approximately $0.5 million for each of the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015 and 2014, there were no amounts related to superannuation contributions due to the defined contribution plan included in compensation payable.

Note 13 — Retirement Plan

In the U.S., the Company sponsors a qualified defined contribution plan (the “Retirement Plan”) covering all eligible employees of G&Co. The Retirement Plan provides for both employee contributions in accordance with Section 401(k) of the Internal Revenue Code, and employer discretionary profit sharing contributions, subject to statutory limits. Participants may contribute up to 75% of eligible compensation, as defined. The Company incurred costs of $0.3 million, $0.2 million and $0.2 million for contributions to the Retirement Plan for the years ended December 31, 2015, 2014 and 2013, respectively. There was $0.2 million related to contributions due to the Retirement Plan included in compensation payable at each of December 31, 2015 and 2014.

GCI also operates a defined contribution pension fund for its employees. The assets of the pension fund are held separately in an independently administered fund. For the years ended December 31, 2015, 2014 and 2013, GCI incurred costs for the funding of pension contributions of approximately $0.5 million, $0.6 million and $0.6 million, respectively. At December 31, 2015 and 2014, there were no amounts related to contributions due to the defined contribution pension fund included in compensation payable.

Greenhill Australia is required by Australian law to contribute compulsory superannuation on employees' gross earnings, generally at a rate of 9%, subject to an annual limit per employee. Superannuation is a defined contribution plan in which retirement benefits are determined by the contribution accumulated over the working life plus investment earnings within the fund less expenses. Greenhill Australia incurred costs for the funding of pension contributions of approximately $0.5 million for each of the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015 and 2014, there were no amounts related to superannuation contributions due to the defined contribution plan included in compensation payable.