Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY

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STOCKHOLDERS' EQUITY
 6 Months Ended
Jun. 30, 2021
Stockholders' Equity Note [Abstract]  
STOCKHOLDERS' EQUITY STOCKHOLDERS’ EQUITY
A summary of changes in stockholders’ equity is presented below (in thousands): 
  Six Months Ended June 30, 2021
  (In thousands)
  Number of
Shares		 Common
Stock		 Additional
Paid-In
Capital		 Retained
Earnings		 Total
Balance at December 31, 2020 37,512  $ 375  $ 455,762  $ 1,891,731  $ 2,347,868 
Net earnings —  —  —  131,843  131,843 
Stock-based compensation expense —  —  5,367  —  5,367 
Issuance of stock 435  4  (4) —  — 
Share repurchases (100) (1) (8,384) —  (8,385)
Balance at March 31, 2021 37,847  $ 378  $ 452,741  $ 2,023,574  $ 2,476,693 
Net earnings —  —  —  167,389  167,389 
Stock-based compensation expense —  —  3,223  —  3,223 
Share repurchases (200) (2) (19,159) —  (19,161)
Balance at June 30, 2021 37,647  $ 376  $ 436,805  $ 2,190,963  $ 2,628,144 

  Six Months Ended June 30, 2020
  (In thousands)
  Number of
Shares		 Common
Stock		 Additional
Paid-In
Capital		 Retained
Earnings		 Total
Balance at December 31, 2019 38,199  $ 382  $ 505,352  $ 1,468,256  $ 1,973,990 
Net earnings —  —  —  71,152  71,152 
Stock-based compensation expense —  —  6,437  —  6,437 
Issuance of stock 398  4  (4) —  — 
Share repurchases (1,000) (10) (60,803) —  (60,813)
Balance at March 31, 2020 37,597  $ 376  $ 450,982  $ 1,539,408  $ 1,990,766 
Net earnings —  —  —  90,678  90,678 
Stock-based compensation expense —  —  3,157  —  3,157 
Issuance of stock 6  1  (1) —  — 
Balance at June 30, 2020 37,603  $ 377  $ 454,138  $ 1,630,086  $ 2,084,601