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Employee Benefit Plans: | 12 Months Ended
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Dec. 31, 2012
Employee Benefit Plans: |
Employee Benefit Plans: | 21. Employee Benefit Plans: 401(k) Plan: The Company has a defined contribution retirement plan that covers its eligible employees (the "Plan"). The Plan is qualified in accordance with section 401(a) of the Internal Revenue Code ("Code"). Effective January 1, 1995, the Plan was amended to constitute a qualified cash or deferred arrangement under section 401(k) of the Code, whereby employees can elect to defer compensation subject to Internal Revenue Service withholding rules. This Plan was further amended effective as of February 1, 1999 to add The Macerich Company Common Stock Fund as a new investment alternative under the Plan. A total of 150,000 shares of common stock were reserved for issuance under the Plan, which was subsequently increased by an additional 500,000 shares in January 2013. Contributions by the Company to the Plan were made at the discretion of the Board of Directors and were based upon a specified percentage of employee compensation. On January 1, 2004, the Plan adopted the "Safe Harbor" provision under Sections 401(k)(12) and 401(m)(11) of the Code. In accordance with adopting these provisions, the Company makes matching contributions equal to 100 percent of the first three percent of compensation deferred by a participant and 50 percent of the next two percent of compensation deferred by a participant. During the years ended December 31, 2012, 2011 and 2010, these matching contributions made by the Company were $3,094, $3,077 and $3,502, respectively. Contributions and matching contributions to the Plan by the plan sponsor and/or participating affiliates are recognized as an expense of the Company in the period that they are made. Deferred Compensation Plans: The Company has established deferred compensation plans under which key executives of the Company may elect to defer receiving a portion of their cash compensation otherwise payable in one calendar year until a later year. The Company may, as determined by the Board of Directors in its sole discretion prior to the beginning of the plan year, credit a participant's account with a matching amount equal to a percentage of the participant's deferral. The Company contributed $648, $570 and $586 to the plans during the years ended December 31, 2012, 2011 and 2010, respectively. Contributions are recognized as compensation in the periods they are made.

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