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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Summary of Restricted Stock Transactions

A summary of restricted and deferred stock transactions during the three months ended March 31, 2020 is as follows:

 
Number of shares
Non-vested stock awards outstanding at January 1, 2020
2,102,654

Awarded:

Time-vesting shares
68,824

Performance-based shares
161,426

Released:

Time-vesting shares
(82,427
)
Performance-based shares
(163,458
)
Forfeitures:
 
       Time-vesting shares
(47,700
)
Performance-based shares

Non-vested stock awards outstanding at March 31, 2020
2,039,319