Organization	3 Months Ended
Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Greenhill & Co., Inc., a Delaware corporation, together with its subsidiaries (collectively, the “Company”), is a leading independent investment bank focused on providing financial and strategic advice on significant domestic and cross-border mergers and acquisitions, divestitures, restructurings, financings and capital raising and other transactions to a diverse client based including corporations, partnerships, institutions and governments. The Company acts for clients located throughout the world from its offices located in the United States, United Kingdom, Germany, Sweden, Australia, Japan, Hong Kong, Singapore, Canada and Brazil. The Company's wholly-owned subsidiaries provide advisory services in various jurisdictions. Our most significant operating entities include: Greenhill & Co., LLC (“G&Co”), Greenhill & Co. International LLP (“GCI”), Greenhill & Co. Australia Pty Limited (“Greenhill Australia”) and Greenhill Cogent, LP ("Greenhill Cogent"). G&Co is engaged in investment banking activities principally in the United States. G&Co is registered as a broker-dealer with the Securities and Exchange Commission (“SEC”) and the Financial Industry Regulatory Authority (“FINRA”), and is licensed in all 50 states and the District of Columbia. GCI is engaged in investment banking activities in the United Kingdom. and is subject to regulation by the U.K. Financial Conduct Authority (“FCA”). Greenhill Australia engages in investment banking activities in Australia and New Zealand and is licensed and subject to regulation by the Australian Securities and Investment Commission (“ASIC”). Greenhill Cogent is engaged in capital advisory services to institutional investors principally in the United States and is registered as a broker-dealer with the SEC and FINRA. See "Note 3 — Acquisition". The Company also operates in other locations throughout the world which are subject to regulation by other governmental and regulatory bodies and self-regulatory authorities.

Organization

Greenhill & Co., Inc., a Delaware corporation, together with its subsidiaries (collectively, the “Company”), is a leading independent investment bank focused on providing financial and strategic advice on significant domestic and cross-border mergers and acquisitions, divestitures, restructurings, financings and capital raising and other transactions to a diverse client based including corporations, partnerships, institutions and governments. The Company acts for clients located throughout the world from its offices located in the United States, United Kingdom, Germany, Sweden, Australia, Japan, Hong Kong, Singapore, Canada and Brazil.

The Company's wholly-owned subsidiaries provide advisory services in various jurisdictions. Our most significant operating entities include: Greenhill & Co., LLC (“G&Co”), Greenhill & Co. International LLP (“GCI”), Greenhill & Co. Australia Pty Limited (“Greenhill Australia”) and Greenhill Cogent, LP ("Greenhill Cogent").

G&Co is engaged in investment banking activities principally in the United States. G&Co is registered as a broker-dealer with the Securities and Exchange Commission (“SEC”) and the Financial Industry Regulatory Authority (“FINRA”), and is licensed in all 50 states and the District of Columbia. GCI is engaged in investment banking activities in the United Kingdom. and is subject to regulation by the U.K. Financial Conduct Authority (“FCA”). Greenhill Australia engages in investment banking activities in Australia and New Zealand and is licensed and subject to regulation by the Australian Securities and Investment Commission (“ASIC”). Greenhill Cogent is engaged in capital advisory services to institutional investors principally in the United States and is registered as a broker-dealer with the SEC and FINRA. See "Note 3 — Acquisition".

The Company also operates in other locations throughout the world which are subject to regulation by other governmental and regulatory bodies and self-regulatory authorities.