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Business and Organization | 12 Months Ended
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Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Business and Organization | Business and Organization Business—iStar Inc. (the "Company"), doing business as "iStar," finances, invests in and develops real estate and real estate related projects as part of its fully-integrated investment platform. The Company also provides management services for its ground lease and net lease equity method investments (refer to Note 7). The Company has invested more than $35 billion over the past two decades and is structured as a real estate investment trust ("REIT") with a diversified portfolio focused on larger assets located in major metropolitan markets. The Company's primary business segments are real estate finance, land and development, net lease and operating properties (refer to Note 17). Organization—The Company began its business in 1993 through the management of private investment funds and became publicly traded in 1998. Since that time, the Company has grown through the origination of new investments, as well as through corporate acquisitions.

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