Financial Requirements	12 Months Ended
Dec. 31, 2017
Financial Requirements [Abstract]
Financial Requirements	L. Financial Requirements As a registered broker-dealer, G.distributors is subject to the Uniform Net Capital Rule 15c3-1 (the “Rule”) of the SEC. These regulatory capital requirements, while not specific encumbrances on assets, restrict the total assets of this subsidiary broker-dealer to the extent they are needed to fulfill the regulatory capital requirements. Accordingly, this restriction limits the transfer of funds from this subsidiary to the Company in the form of cash dividends or otherwise. This restriction is 120% of its minimum net capital. G.distributors computes its net capital under the alternative method permitted by the Rule which requires minimum net capital of $250,000, and it exceeded this requirement at December 31, 2017. Our subsidiary, GAMCO Asset Management (UK) Limited is authorized and regulated by the Financial Conduct Authority (“FCA”). In February 2011, GAMCO Asset Management (UK) Limited increased its permitted license with the FCA’s predecessor, the Financial Services Authority (“FSA”) and has held Total Capital of £632,000 and £580,000 ($853,000 and $713,000 at December 31, 2017 and 2016, respectively) and had a Financial Resources Requirement of £216,000 and £265,000 ($291,000 and $326,000 at December 31, 2017 and 2016, respectively). We have consistently met or exceeded these minimum requirements.

L. Financial Requirements

As a registered broker-dealer, G.distributors is subject to the Uniform Net Capital Rule 15c3-1 (the “Rule”) of the SEC. These regulatory capital requirements, while not specific encumbrances on assets, restrict the total assets of this subsidiary broker-dealer to the extent they are needed to fulfill the regulatory capital requirements. Accordingly, this restriction limits the transfer of funds from this subsidiary to the Company in the form of cash dividends or otherwise. This restriction is 120% of its minimum net capital. G.distributors computes its net capital under the alternative method permitted by the Rule which requires minimum net capital of $250,000, and it exceeded this requirement at December 31, 2017.

Our subsidiary, GAMCO Asset Management (UK) Limited is authorized and regulated by the Financial Conduct Authority (“FCA”). In February 2011, GAMCO Asset Management (UK) Limited increased its permitted license with the FCA’s predecessor, the Financial Services Authority (“FSA”) and has held Total Capital of £632,000 and £580,000 ($853,000 and $713,000 at December 31, 2017 and 2016, respectively) and had a Financial Resources Requirement of £216,000 and £265,000 ($291,000 and $326,000 at December 31, 2017 and 2016, respectively). We have consistently met or exceeded these minimum requirements.