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Long-Term Compensation | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract] |
Long-Term Compensation | Long-Term Compensation Awards with Performance Measures During the three months ended March 31, 2023, 44,821 performance units ("Performance Units") and 280,083 RLP Units ("Performance RLP Units" and, together with the Performance Units, collectively the "Performance Awards") were granted to certain employees based on performance-based criteria, which had a fair value of approximately $8,054 on the grant date as determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. A portion of each Performance Award vests based upon the total shareholder return ("TSR") of the Company's common stock compared to the TSR of the FTSE Nareit All Equity Index and the remainder vests based upon the TSR of the Company’s common stock compared to a specified group of peer industrial real estate companies. The performance period for these Performance Awards is three years. Compensation expense is charged to earnings over the applicable vesting period for the Performance Awards. At the end of the measuring period, vested Performance Units convert into shares of common stock. Service Based Awards For the three months ended March 31, 2023, 52,107 shares of restricted stock units ("Service Units") and 86,982 RLP Units ("Service RLP Units" and together with the Service Units, collectively the "Service Awards") were granted to certain employees and outside directors based on service-based criteria, which had an aggregate fair value of approximately $7,132 on the grant date. The fair value of the Service Awards is based on the Company's stock price on the date such awards were approved by the Compensation Committee of the Board of Directors. The Service Awards were based on the prior achievement of certain corporate performance goals and generally vest ratably over three years based on continued employment. Compensation expense is charged to earnings over the vesting periods for the Service Awards. At the end of the service period, vested Service Units convert into shares of common stock. Retirement Eligibility All award agreements issued underlying Performance Awards and Service Awards contain a retirement benefit for employees with at least 10 years of continuous service and are at least 60 years old. For employees that meet the age and service eligibility requirements, their awards are non-forfeitab le. As such, during the three months ended March 31, 2023, we expensed 100% of the awards granted to retirement-eligible employees at the grant date as if fully vested. For employees who will meet the age and service eligibility requirements during the normal vesting periods, the grants are amortized over the shorter service period. Outstanding Performance Awards and Service Awards We recognized $6,141 and $5,101 for the three months ended March 31, 2023 and 2022, respectively, in compensation expense related to the amortization of the Service Awards and the Performance Awards. Service Award and Performance Award amortization capitalized in connection with development activities was $1,706 and $1,173 for the three months ended March 31, 2023 and 2022, respectively. At March 31, 2023, we had $19,581 in unrecognized compensation related to unvested Service Awards and Performance Awards. The weighted average period over which the unrecognized compensation is expected to be recognized is 1.04 years.

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