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Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of Nonvested Share Activity
The following table summarizes the restricted stock awards, deferred stock units, and performance share units activity for the six months ended June 30, 2021:
Restricted
Stock
Deferred
Stock Units
Performance
Share Units
Weighted Average
Grant Date Fair Value
Outstanding as of December 31, 2020171,934 66,136 150,022 $18.05 
Granted108,300 8,814 141,471 16.13 
Vested(98,234)— (7,940)19.08 
Adjustment for incentive awards expected to vest— — (55,743)17.87 
Outstanding as of June 30, 2021182,000 74,950 227,810 $17.77