Subsequent Events	3 Months Ended
Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company evaluates subsequent events through the date on which the financial statements are issued. On April 1, 2015, the Company acquired Cogent Partners, LP (“Cogent”), a global financial advisor to pension funds, endowments and other institutional investors on the secondary market for alternative assets. Pursuant to the Unit Purchase Agreement (as amended, the “Unit Purchase Agreement”) with Cogent, its affiliates (the “Cogent Affiliates”) and equity holders (the “Sellers”), the Company acquired 100% ownership of Cogent and the Cogent Affiliates (the “Acquisition”) in exchange for a combination of approximately $44.0 million in cash and 779,454 shares of the Company's common stock paid at the closing of the Acquisition (with the stock portion being received only by those former Cogent equity holders who were employed by Cogent and its affiliates at closing (such persons, the “Employee Sellers”)), with an additional approximately $18.9 million in cash plus 334,054 shares of the Company's common stock payable in the future if certain agreed revenue targets are achieved (with the stock portion to be received only by the Employee Sellers). A portion of the cash and stock issued by the Company at closing was placed into escrow to cover potential post-closing obligations of the Sellers. Consistent with its normal personnel recruiting policies, and in order to provide long term incentives for retention and continued strong performance, the Company also granted restricted stock units and other deferred compensation, which will vest over time, to the Employee Sellers. Cogent will conduct business in its principal office in Dallas and additional locations in London, New York, San Francisco and Singapore under the name Greenhill Cogent. All eight of Cogent's client-facing Managing Directors and total staff of 41 employees joined the Company at closing. The cash component of the consideration paid at closing was funded by new bank borrowings, comprising two term loan facilities (the “Term Loan Facilities”), each in an original principal amount of $22,500,000, and together in the aggregate amount of $45,000,000. One Term Loan Facility matures on April 30, 2016 (the “12 Month Facility”) and the other Term Loan Facility matures on April 30, 2018 (the “36 Month Facility”). In addition, as part of the financing arrangements for the Acquisition, the maturity date of the revolving loan facility was extended to April 30, 2016 and the amount of the revolving loan facility was increased to $50.0 million. The loan facilities are secured by any cash distributed in respect of the Company’s investment in the U.S. based merchant banking funds and cash distributions from G&Co. In addition, the loan facilities have a prohibition on the incurrence of additional indebtedness without the prior approval of the lenders and the Company is required to comply with certain financial and liquidity covenants. The interest rate applicable to the 12 Month Facility is equal to the Prime Rate plus three-quarters of one percent (0.75%) per annum. The interest rate generally applicable to the 36 Month Facility is equal to the Prime Rate plus one and one-quarter percent (1.25%) per annum. The interest rate applicable to either Term Loan Facility shall never be less than four percent (4.00%) per annum. The interest rate applicable to the revolving loan facility continued to be based on the higher of 3.25% or the Prime Rate. On April 23, 2015, the Board of Directors of the Company declared a quarterly dividend of $0.45 per share. The dividend will be payable on June 17, 2015 to the common stockholders of record on June 3, 2015.

Subsequent Events

The Company evaluates subsequent events through the date on which the financial statements are issued.

On April 1, 2015, the Company acquired Cogent Partners, LP (“Cogent”), a global financial advisor to pension funds, endowments and other institutional investors on the secondary market for alternative assets. Pursuant to the Unit Purchase Agreement (as amended, the “Unit Purchase Agreement”) with Cogent, its affiliates (the “Cogent Affiliates”) and equity holders (the “Sellers”), the Company acquired 100% ownership of Cogent and the Cogent Affiliates (the “Acquisition”) in exchange for a combination of approximately $44.0 million in cash and 779,454 shares of the Company's common stock paid at the closing of the Acquisition (with the stock portion being received only by those former Cogent equity holders who were employed by Cogent and its affiliates at closing (such persons, the “Employee Sellers”)), with an additional approximately $18.9 million in cash plus 334,054 shares of the Company's common stock payable in the future if certain agreed revenue targets are achieved (with the stock portion to be received only by the Employee Sellers). A portion of the cash and stock issued by the Company at closing was placed into escrow to cover potential post-closing obligations of the Sellers. Consistent with its normal personnel recruiting policies, and in order to provide long term incentives for retention and continued strong performance, the Company also granted restricted stock units and other deferred compensation, which will vest over time, to the Employee Sellers.

Cogent will conduct business in its principal office in Dallas and additional locations in London, New York, San Francisco and Singapore under the name Greenhill Cogent. All eight of Cogent's client-facing Managing Directors and total staff of 41 employees joined the Company at closing.

The cash component of the consideration paid at closing was funded by new bank borrowings, comprising two term loan facilities (the “Term Loan Facilities”), each in an original principal amount of $22,500,000, and together in the aggregate amount of $45,000,000. One Term Loan Facility matures on April 30, 2016 (the “12 Month Facility”) and the other Term Loan Facility matures on April 30, 2018 (the “36 Month Facility”). In addition, as part of the financing arrangements for the Acquisition, the maturity date of the revolving loan facility was extended to April 30, 2016 and the amount of the revolving loan facility was increased to $50.0 million. The loan facilities are secured by any cash distributed in respect of the Company’s investment in the U.S. based merchant banking funds and cash distributions from G&Co. In addition, the loan facilities have a prohibition on the incurrence of additional indebtedness without the prior approval of the lenders and the Company is required to comply with certain financial and liquidity covenants.

The interest rate applicable to the 12 Month Facility is equal to the Prime Rate plus three-quarters of one percent (0.75%) per annum. The interest rate generally applicable to the 36 Month Facility is equal to the Prime Rate plus one and one-quarter percent (1.25%) per annum. The interest rate applicable to either Term Loan Facility shall never be less than four percent (4.00%) per annum. The interest rate applicable to the revolving loan facility continued to be based on the higher of 3.25% or the Prime Rate.

On April 23, 2015, the Board of Directors of the Company declared a quarterly dividend of $0.45 per share. The dividend will be payable on June 17, 2015 to the common stockholders of record on June 3, 2015.