Stock-based Compensation

3 Months Ended

Mar. 31, 2012

Stock-based Compensation [Abstract]

Stock-based Compensation

13.       Incentive Compensation

Our Omnibus Share Plan (the “Plan”) provides for grants of incentive and non-qualified stock options, restricted stock, restricted Operating Partnership units and out-performance plan rewards to certain of our employees and officers. We account for all stock-based compensation in accordance ASC 718, Compensation – Stock Compensation. Stock-based compensation expense for the three months ended March 31, 2012 and 2011 consists of stock option awards, restricted stock awards, Operating Partnership unit awards and out-performance plan awards. Stock-based compensation expense was $6,609,000and $7,146,000 in the three monthsended March 31, 2012 and 2011, respectively.

On March 30, 2012, our Compensation Committee (the “Committee”) approved the 2012 formulaic annual incentive program for our senior executive management team.  Under the program, our senior executive management team, including our Chairman and our President and Chief Executive Officer, will have the ability to earn annual incentive payments (cash or equity) if and only if we achieve comparable funds from operations (“Comparable FFO”) of at least 80% or more of the prior year Comparable FFO.  Moreover, even if we achieve the stipulated Comparable FFO performance requirement, the Committee retains the right, consistent with best practices, to elect to make no payments under the program.  Comparable FFO excludes the impact of certain non-recurring items such as income or loss from discontinued operations, the sale or mark-to-market of marketable securities or derivatives and early extinguishment of debt, restructuring costs and non-cash impairment losses, among others, and thus the Committee believes provides a better metric than total FFO for assessing management's performance for the year. Aggregate incentive awards earned under the program are subject to a cap of 1.25% of Comparable FFO for the year, with individual award allocations determined by the Committee based on an assessment of individual and overall performance.

On March30, 2012, the Committee also approved the 2012 Out-Performance Plan, a multi-year, performance-based equity compensation plan (the “2012 OPP”).  The aggregate notional amount of the 2012 OPP is $40,000,000. Under the 2012 OPP, participants, including our Chairman and our President and Chief Executive Officer, have the opportunity to earn compensation payable in the form of equity awards if and only if we outperform a predetermined total shareholder return (“TSR”) and/or outperform the market with respect to a relative TSR in any year during a three-year performance period.   Specifically, awards under our 2012 OPP may be earned if we (i) achieve a TSR above that of the SNL US REIT Index (the “Index”) over a one-year, two-year or three-year performance period (the “Relative Component”), and/or (ii) achieve a TSR level greater than 7% per annum, or 21% over the three-year performance period (the “Absolute Component”).  To the extent awards would be earned under the Absolute Component of the 2012 OPP but we underperform the Index, such awards would be reduced (and potentially fully negated) based on the degree to which we underperform the Index.  In certain circumstances, in the event we outperform the Index but awards would not otherwise be earned under the Absolute Component, awards may still be earned under the Relative Component. To the extent awards would otherwise be earned under the Relative Component but we fail to achieve at least a 6% per annum absolute TSR level, such awards would be reduced based on our absolute TSR performance, with no awards being earned in the event our TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which we may outperform the Index.  If the designated performance objectives are achieved, OPP Units are also subject to time-based vesting requirements. Dividends on awards issued accrue during the performance period and are paid to participants if and only if awards are ultimately earned based on the achievement of the designated performance objectives. Awards earned under the 2012 OPP vest 33% in year three, 33% in year four and 34% in year five. The fair value of the 2012 OPP on the date of grant,as adjusted for estimated forfeitures, was $12,250,000, and is being amortized into expense over a five-year period from the date of grant, using a graded vesting attribution model.