Organization and Basis of Presentation (Policies)	3 Months Ended
Organization and Basis of Presentation (Policies)	Mar. 31, 2014
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 City Partners, 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 City Partners, 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, 2014. 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, 2013. Certain amounts in the consolidated statements of operations for prior periods have been reclassified to reflect the activity of discontinued operations.
Partially Owned Entities and Variable Interest Entities	At March 31, 2014, the consolidated financial statements of the Company and the Operating Partnership included one variable interest entity (“VIE”), Redwood City Partners, LLC, in which we were deemed to be the primary beneficiary. This VIE 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 $61.6 million (of which $60.6 million related to real estate held for investment on our consolidated balance sheet), approximately $6.8 million and approximately $4.9 million, respectively, as of March 31, 2014. As of December 31, 2013, the consolidated financial statements of the Company and the Operating Partnership included four VIEs, in which we were deemed to be the primary beneficiary. One of the VIEs was Redwood City Partners, LLC and the remaining three VIEs were established during the third and fourth quarter of 2013 to facilitate a potential Section 1031 Exchange. During the three months ended March 31, 2014, the Section 1031 Exchanges were successfully completed and the three VIEs were terminated. As a result, $32.2 million of our restricted cash balance at December 31, 2013, which related to prior period disposition proceeds that were set aside to facilitate the Section 1031 Exchanges, was released from escrow. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $251.8 million (of which $234.5 million related to real estate held for investment on our consolidated balance sheet), approximately $12.1 million and approximately $4.9 million, respectively, as of December 31, 2013.
Recent Accounting Pronouncements	On April 10, 2014, the Financial Accounting Standards Board issued final guidance to change the criteria for reporting discontinued operations while enhancing disclosures in this area (Accounting Standards Update (“ASU”) No. 2014-08). Under the new guidance, only disposals representing a strategic shift, such as a major line of business, a major geographical area or a major equity investment, should be presented as discontinued operations. The guidance will be applied prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date. The guidance is effective for annual financial statements with fiscal years beginning on or after December 15, 2014 with early adoption permitted for disposals or classifications as held for sale which have not been reported in financial statements previously issued or available for issuance. The Company will adopt the guidance effective January 1, 2015 and the guidance is not anticipated to have a material impact on our consolidated financial statements and notes to our consolidated financial statements. On March 13, 2014, the Emerging Issues Task Force (the “Task Force”) reached a final consensus to amend the accounting guidance for stock compensation tied to performance targets (Issue No. 13-D). The objective of this guidance is to clarify the accounting treatment of certain types of performance conditions in stock-based compensation awards, more specifically, when performance targets can be achieved after the requisite service period. The Task Force concluded that performance criteria subsequent to a service period vesting requirement should be treated as vesting conditions, and as a result, this type of performance condition may delay expense recognition until achievement of the performance target is probable. Issue No. 13-D will be effective for all entities for reporting periods (including interim periods) beginning after December 15, 2015, and early adoption is permitted. The adoption of this guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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- Definition

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).

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