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STOCK BASED AND DEFERRED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Summary of Compensation Expense and Stock Award Activity Below is a summary of compensation expense and stock award activity (dollars in thousands):
 Three Months Ended June 30,Six Months Ended June 30,
 2020201920202019
Stock-based compensation expense$3,157  $4,201  $9,594  $10,062  
Non-vested shares granted—  4,500  223,481  382,014  
Performance-based non-vested shares granted —  —  56,139  94,152  
Performance-based shares issued in excess of target shares granted (1)
—  —  24,054  21,039  
Restricted stock awards vested (includes performance-based awards)6,060  2,600  404,406  402,923  
(1)Performance-based shares that vested and were issued as a result of performance achievement exceeding the originally established targeted number of shares related to respective performance metrics.
Summary of Additional Information Regarding Stock Plan
The following table includes additional information regarding our Stock Plans (dollars in thousands):
 As of
 June 30, 2020December 31, 2019
Unrecognized stock-based compensation cost$28,233  $22,341  
Weighted average years expense recognition period2.511.70
Total equity awards outstanding (1)
1,111,295  1,240,529  
(1)Includes unvested restricted stock, performance-based awards (assuming 100% payout) and restricted stock units.