Organization and Basis of Presentation (Policies)	9 Months Ended
Organization and Basis of Presentation (Policies)	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation Policy	The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all of our wholly owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all wholly-owned and controlled subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.
Basis of Accounting	The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014. Certain amounts in the consolidated statements of operations for prior periods have been reclassified to reflect the activity of discontinued operations disposed of prior to the Company's adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2014-08 (“ASU 2014-08”). Properties classified as held for sale and/or disposed of prior to January 1, 2015 are presented as discontinued operations for all periods presented.
Partially Owned Entities and Variable Interest Entities	At September 30, 2015, the consolidated financial statements of the Company and the Operating Partnership included one variable interest entity (“VIE”), in which we were deemed to be the primary beneficiary. The VIE, Redwood LLC, was established in the second quarter of 2013 in connection with an undeveloped land acquisition. The impact of consolidating the VIE increased the Company’s total assets, liabilities and noncontrolling interests by approximately $180.7 million (of which $176.9 million related to real estate held for investment on our consolidated balance sheet), approximately $43.5 million and approximately $6.3 million, respectively, as of September 30, 2015. As of December 31, 2014, the consolidated financial statements of the Company and the Operating Partnership included two VIEs, in which we were deemed to be the primary beneficiary. One of the VIEs was Redwood LLC and the remaining VIE was established during the fourth quarter of 2014 to facilitate potential Section 1031 Exchanges. During the three months ended March 31, 2015, the Section 1031 Exchange was successfully completed and the VIE was terminated. As a result, $59.2 million of our restricted cash balance at December 31, 2014, which related to prior period disposition proceeds that were set aside to facilitate the Section 1031 Exchange, was released from escrow. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $219.6 million (of which $211.8 million related to real estate held for investment on our consolidated balance sheet), approximately $23.4 million and approximately $5.9 million, respectively, as of December 31, 2014.
Recent Accounting Pronouncements	Recently Issued Accounting Pronouncements On August 12, 2015, the FASB issued ASU No. 2015-14 (“ASU 2015-14”) to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, adoption is required for annual reporting periods beginning after December 15, 2017. The Company is currently assessing the impact of the guidance on our consolidated financial statements and notes to our consolidated financial statements. On April 7, 2015, the FASB issued ASU No. 2015-03 (“ASU 2015-03”) to amend the accounting guidance for the presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. On August 18, 2015, the FASB also issued ASU No. 2015-15 (“ASU 2015-15”) to address the presentation of debt issuance costs specifically related to line-of-credit arrangements. The standard clarifies that an entity may defer and present debt issuance costs as an asset and amortize the costs ratably over the term of the line-of-credit arrangement, regardless of whether there are an outstanding borrowings on the line-of credit arrangement. ASU 2015-03 and ASU 2015-15 are effective for public business entities for fiscal years beginning after December 15, 2015 and retrospective application is required. Early adoption of the guidance is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance will not have any impact on our consolidated statements of operations, equity/capital, or cash flows. In February 2015, the FASB issued an update (“ASU 2015-02”) Amendments to the Consolidation Analysis to ASC Topic 810, Consolidation. ASU 2015-02 affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. Specifically, the amendments: (i) modify the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities, (ii) eliminate the presumption that a general partner should consolidate a limited partnership, (iii) affect the consolidated analysis of reporting entities that are involved with VIEs, and (iv) provide a scope exception for certain entities. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015. The Company is currently assessing the impact of the guidance on our consolidated financial statements and notes to our consolidated financial statements.

Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).